Vitor Brás Sequeira Amaral

Professor Catedrático

Contacto

Departamento

  • Física
  • 13.3.311

Investigação

Ligações

Perfil biográfico

Academic degrees, dates, institutions, thesis titles: 1985-Licenciatura, Física-Ramo Científico de Física do Estado Sólido e Ciência dos Materiais, Faculdade de Ciências da Universidade do Porto 1993-PhD in Physics, Condensed Matter, Universidade do Porto, "Localização Electónica e Magnetismo em Amorfos Metálicos" 2005-Agregação in Physics, Universidade de Aveiro Previous positions, dates, institutions: Assistente Estagiário, 1985, Faculdade de Ciências da Universidade do Porto Assistente, 1988, Faculdade de Ciências da Universidade do Porto Professor Auxiliar, 1993, Faculdade de Ciências da Universidade do Porto.

Interesses científicos

Principal investigation area: Magnetism, Superconductivity, Nuclear Solid State Techniques Other scientific areas of interest: Nanotechnology, Low temperature physics

Publicações seleccionadas

SCI PUBLICATIONS 1. Competing Effects in the Electrical Resistivity of the Random Anisotropy Series: a-(DyxGd1-x)Ni J.B. Sousa, J.M. Moreira, V.S. Amaral, M.M. Amado, M.E. Braga, B. Barbara, B. Dieny, J. Filippi Journal of Physics F: Met. Phys. 17, 2377 (1987) 2. First Order Antiferromagnetic Transition in Cubic TbAg P. Morin, J. Rouchy, M.M. Amado, R.P. Pinto, J.M. Moreira, V.S. Amaral, M.E. Braga, J.B. Sousa Journal de Physique (Paris), Colloque C8, 49, 395, (1988) 3. Magnetoresistance of Amorphous Ising Spin Glasses: a-(DyxGd1-x)Ni. Possible Coexistence between Magnetism and Weak Localization. V.S. Amaral, J.M. Moreira, J.B. Sousa, B. Barbara, J. Filippi, B. Dieny Journal de Physique (Paris), Colloque C8, 49, 1237, (1988) 4. Transport Properties in Amorphous UxT1-x films (T=Fe, Ni, Gd, Tb and Yb) P.P. Freitas, T.S. Plaskett, J.M. Moreira, V.S. Amaral Journal of Applied Physics, 64, 5453, (1988) 5. Anomalous Electron Transport in Nd2Fe14B single crystal J.B. Sousa, M.M. Amado, R.P. Pinto, V.S. Amaral, M.E. Braga Journal of Physics: Condensed Matter, 2, 7543, (1990) 6. On the Contribution of Magnetic Scattering to Weak Localization Magnetoresistance V.S. Amaral Journal of Physics: Condensed Matter, 2, 8201, (1990) 7. Modifications of Weak Localization Contributions to Magnetoresistance due to magnetic impurities in amorphous DyxY1-x Ni alloys B. Barbara, V.S. Amaral, J. Filippi, A.G.M. Jansen, J.B. Sousa e J.M. Moreira Journal of Applied Physics,. 70, 5813, (1991) 8. High-field Magnetization Curve of Random-Anisotropy Amorphous Magnets: Observation of a crossover and link to Structural Short Range Order J. Filippi, V.S. Amaral, B. Barbara Physical Review B - Rapid Communications, 44, 2842, (1991) 9. Coexistence of Weak Localization and Magnetism in Amorphous alloys: (DyxY1-x)Ni V.S. Amaral, B. Barbara, J.B. Sousa, J. Filippi, A.G.M. Jansen, J.M. Moreira Journal of Magnetism and Magnetic Materials, 104-107, 2079, (1992) 10. Quantitative Description of the Magnetization Curves of Amorphous Alloys of the Series: a-DyxGd1-xNi B. Barbara, V.S. Amaral, J. Filippi Journal of Magnetism and Magnetic Materials,. 116, 58, (1992) 11. High Field Magnetization of Two Types of Shortly Correlated Systems: Random Anisotropy Systems and Nanoparticles B. Barbara, J. Filippi, A. Marchand, P. Mollard, V.S. Amaral, X. Devaux, A. Rousset Journal de Physique I, 2, 101, (1992) 12. Weak Localization in Amorphous Alloys in the Presence of Magnetic Impurities: Enhancement of the Spin-splitting Contribution V.S. Amaral, B. Barbara, J.B. Sousa, J. Filippi, A.G.M. Jansen, J.M. Moreira Europhysics Letters, 21, 61, (1993) 13. Spin Wave Localization in Random Anisotropy Systems: Amorphous (DyxGd1-x)Ni V.S. Amaral, B. Barbara, J.B. Sousa, J. Filippi Europhysics Letters, 22, 139, (1993) 14. -Relaxation and Thermal Hysteresis in the Electrical Resistivity of (Nd1.6Sr0.4) NiO4+ Compounds J.B. Sousa, J.A. Mendes, V.S. Amaral, M.P. Sridhar Kumar, D. McK.Paul e S.B. Palmer Physica B, 192, 358, (1993) 15. Anomalous Electron Scattering in Pd-Ni Multilayered Films M.A. Salgueiro, J.B. Sousa, M.E. Braga, V.S. Amaral, N.K. Flevaris Journal of Magnetism and Magnetic Materials, 121, 440, (1993) 16. Magnetoresistance and Local Magnetic Order in Random Anisotropy Ferromagnetic Systems V.S. Amaral, J.B. Sousa, J.M. Moreira, B. Barbara, J. Filippi e A.G.M. Jansen Physica B 194-196, 315, (1994) 17. Quantum Corrections in the Magnetic Susceptibility: Amorphous Y0.5Ni0.5 B. Barbara, J. Filippi, V.S. Amaral, J.B. Sousa Physica B 194-196, 1097, (1994) 18. Electron-Electron Interactions in the Presence of Magnetic Impurities: Effect on the Temperature Dependence of Resistivity V.S. Amaral, J.B. Sousa, B. Barbara, J. Filippi, A.G.M. Jansen Physica B 194-196, 1095, (1994) 19. Electrical Resistivity and Local Magnetic Order in Random Anisotropy Amorphous Ferromagnets V.S. Amaral, J.B. Sousa, J.M. Moreira, B. Barbara, J. Filippi Journal of Applied Physics, 75, 6513, (1994) 20. Localization Induced Spin Fluctuations in Amorphous Y1-xNix Alloys V.S. Amaral, B. Barbara Journal of Magnetism and Magnetic Materials, 140-144, 2011, (1995) 21. Magnetoresistance and SQUID measurements in Gd70.5Sc29.5 single crystals J.M. Moreira, J.A. Mendes, M. Salgueiro da Silva, V.S. Amaral, J.B. Sousa, S.B. Palmer Journal of Magnetism and Magnetic Materials, 140-144, 747, (1995) 22. Magnetic After-Effect at Low Temperature: Linear Response and Quantum Noise J. E. Wegrowe, R. Ballou, B. Barbara, V. S. Amaral, A. Sulpice, D. Mailly Physical Review B, 52, 3466, (1995) 23. Magnetic Properties of Gd72Sc28 Single Crystal M.A. Salgueiro da Silva, J.M. Moreira, J.A. Mendes, V.S. Amaral, J.B. Sousa, S.B. Palmer Journal of Physics: Condensed Matter 7, 9853, (1995) 24. Anomalous Electrical Resistivity in Metallic Multilayer Systems and Interfacial Structural Changes M. M. P. de Azevedo, B. G. Almeida, V. S. Amaral, J. B. Sousa, P. P. Freitas, R. Krishnan Journal of Magnetism and Magnetic Materials, 156, 357, (1996) 25. Temperature Dependence of the Electrical Resistivity and Magnetoresistance of Co/Au1-xCux multilayers M. M. P. de Azevedo, V. S. Amaral, J. B. Sousa, P. P. Freitas Journal of Magnetism and Magnetic Materials, 157/158, 276, (1996) 26. Unusual Slow Magnetic Relaxation on a SmCo2/GdCo2 Domain Wall Junction at Low Temperature J. E. Wegrowe, B. Barbara, V.S. Amaral, J.B. Sousa Journal of Physics: Condensed Matter, 161 133, (1996) 27. Giant thermopower in 3D-magnetic multilayers. Structural and electron band effects (abstract) M. M. P. de Azevedo, B. G. Almeida,V. S. Amaral, M. E. Braga, J. B. Sousa, P. P. Freitas, R. Krishnan Journal of Applied Physics, 79, 6246 (1996) 28. Critical Behavior of Magnetoresistivity in La2/3Ca1/3MnO3 J. B. Sousa, V. S. Amaral, Yu. G. Pogorelov, A. L. Guimarães, J. P. Araújo, M. E. Braga, J. A. Mendes, M. R. Ibarra, P. Algarabel, J. Blasco, J. García, C. Marquina, A. del Moral, J. M. de Teresa Journal of Applied Physics, 81, 5760 (1997) 29. Anisotropic Magnetoresistance in Sputtered Co48Ag52 Granular Films J. A. Mendes, V. S. Amaral, J. B. Sousa, L. Thomas, B. Barbara Journal of Applied Physics, 81, 5208 (1997) 30. Electrical Resistivity behavior of Fe/Cr multilayers deposited by different techniques (molecular-beam epitaxy, sputtering), on different substrates (MgO, Si) G. Almeida, V. S. Amaral, J. B. Sousa, J. Colino, I. K. Schuller, R. Schad, V. V. Moschalkov, Y. Bruynseraede Journal of Applied Physics, 81, 5194 (1997) 31. Deposition of Magnetoresistive La1-xCaxMnO3 Thin Films by Aerosol-Assisted MOCVD P. B. Tavares, V. S. Amaral, J. P. Araújo, A.A.C.S. Lourenço, J. B. Sousa, J. M. Vieira Key Engineering Materials, 132-136, 1416 (1997) 32. Giant Magnetoresistance in La1-xCaxMnO3 Ceramics and Thin Films J. P. Araújo, P. B. Tavares, V. S. Amaral, A.A.C.S. Lourenço, J. B. Sousa, J. M. Vieira Key Engineering Materials, 132-136, 1412 (1997) 33. Magnetic and Transport Studies of the - Transformation in Fe54Cr46 and Fe52Cr46Sn2 Alloys: Kinetics of  Phase Formation B. F. O. Costa, M. M. Amado, G. Le Caër, V. S. Amaral, M. A. Sá, J. B. Sousa, N. Ayres de Campos Physica Status Solidi (a), 161, 349 (1997) 34. 46-Temperature Dependence of the Magnetic Interlayer Coupling in Fe/Cr Multilayers B. G. Almeida, V. S. Amaral, J. B. Sousa, J. Colino, I. K. Schuller Journal of Magnetism and Magnetic Materials, 177-181, 1170 (1998) 35. Microscopic Studies of Radioactive Hg Implanted in YBa2Cu3O7 Superconducting Thin Films V. S. Amaral, J. G. Correia, A. A. C. S. Lourenço, J. G. Marques, J. A. Mendes, M. A. V. Baptista, J. P. Araújo, J. M. Moreira, J. B. Sousa, E. Alves, M. F. da Silva, J. C. Soares Journal of Magnetism and Magnetic Materials, 177-181, 511 (1998) 36. Anomalous Low-Field Magnetization in La2/3Ca1/3MnO3 near the Critical Point: Stable Clusters? V. S. Amaral, J. P. Araújo, Yu. G. Pogorelov, J. B. Sousa, P. B. Tavares, J. M. Vieira, J. M. B. Lopes dos Santos, A. A. C. S. Lourenço, P. Algarabel Journal of Applied Physics, 83, 7154 (1998). 37. Stability Studies of Hg Implanted YBa2Cu3O6+x J. P. Araújo, J. G. Correia, U. Wahl, J. G. Marques, E. Alves, V. S. Amaral, A. A. Lourenço, V. Galindo, T. Von Papen, J. P. Sénateur, F. Weiss, A. Vantomme, G. Langouche, A. A. Melo, M. F. da Silva, J. C. Soares, J. B. Sousa and the ISOLDE Collaboration Nuclear Instruments & Methods in Physics Research B, 147, 244 (1999) 38. Deposition of La-CaMnO3 Thin Films Using Aerosol-Assisted MOCVD: Substrate and Annealing Effects P. B. Tavares, V. S. Amaral, J. P. Araújo, A. A. C. S. Lourenço, J. M. Vieira, J. B. Sousa Journal of Magnetism and Magnetic Materials, 196-197, 490 (1999) 39. Properties of Epitaxial LaCaMnO Laser Ablated Thin Films on (100) and (110) SrTiO3 Substrates A. A. C. S. Lourenço, J. P. Araújo, V. S. Amaral, P. B. Tavares, J. B. Sousa, J. M. Vieira, E. Alves, M. F. da Silva e J. C. Soares Journal of Magnetism and Magnetic Materials, 196-197, 495 (1999) 40. Magnetic and Transport Properties of Amorphous Gd-V Films J. A. Mendes, C. S. Abreu, V. S. Amaral, J. M. Moreira, J. B. Sousa, L. Thomas, B. Barbara, H. Rakoto, S. Askenazy Journal of Magnetism and Magnetic Materials, 196-197, 251 (1999) 41. GMR in Co-Evaporated Co-Ag Granular Thin Films M. M. Pereira de Azevedo, G. Kakazei, A. Kravetz, V. S. Amaral, J. B. Sousa Journal of Magnetism and Magnetic Materials, 196-197, 40 (1999) 42. Stability and Diffusion of Hg Implanted YBa2Cu3O6+x J. P. Araújo, J. G. Correia, U. Wahl, J. G. Marques, E. Alves, V. S. Amaral, A. A. Lourenço, V. Galindo, T. Von Papen, J. P. Sénateur, F. Weiss, A. Vantomme, G. Langouche, A. A. Melo, M. F. da Silva, J. C. Soares, J. B. Sousa and the ISOLDE Collaboration Nuclear Instruments & Methods in Physics Research B, 148, 807 (1999) 43. Substrate, Annealing and Mn Excess Effects on La-Ca-MnO3 Thin Films Grown by Metal Organic Chemical Vapor Deposition: a Way to Room Temperature Tc P. B. Tavares, V. S. Amaral, J. P. Araújo, J. B. Sousa A. A. C. S. Lourenço, J. M. Vieira, Journal of Applied Physics, 85, 5411 (1999) 44. Simulation of the Interband s-d and Intraband s-s Electron-phonon Contributions to the Electrical Resistivity of Fe/Cr Multilayers B. Almeida, V. S. Amaral, J. B. Sousa, J. Colino, I. K. Schuller, Y. Bruynseraede Journal of Applied Physics, 85, 4433 (1999) 45. Anisotropic Transport Properties of Epitaxial La2/3Ca1/3MnO3 Thin Films with Different Growth Orientations V. S. Amaral, A. A. C. S. Lourenço, J. P. Araújo, P. B. Tavares, E. Alves, J. B. Sousa, J. M. Vieira, M. F. da Silva and J. C. Soares. Journal of Magnetism and Magnetic Materials, 211, 1 (2000) 46. Anisotropic Electrical Transport in Epitaxial La2/3Ca1/3MnO3 Thin Films V. S. Amaral, A. A. C. S. Lourenço, J. P. Araújo, A. M. Pereira, J. B. Sousa, P. B. Tavares, J. M. Vieira, E. Alves, M. F. da Silva, J. C. Soares. Journal of Applied Physics, 87, 5570 (2000) 47. Electron-gamma perturbed angular correlation studies on high-Tc superconductors J.G. Correia, J. P. Araújo, J. G. Marques, A. R. Ramos, A. A. Lourenço, V. S. Amaral, V. Galindo, J. P. Sénateur, F. Weiss, U. Wahl, A. A. Melo, J. C. Soares, J. B. Sousa and the ISOLDE Collaboration Hyperfine Interactions, 129, 461 (2000). 48. Doping manganites by La-site vacancies and Ca ions: bulk ceramics and thin films J. P. Araújo, V. S. Amaral, P. B. Tavares, F. Lencart-Silva, A. A. C. S. Lourenço, J. B. Sousa, J. M. Vieira Journal of Magnetism and Magnetic Materials, 226-230, 821 (2001) 49. Cadmium addition to vacancy doped Lanthanum manganites: from metallic to insulator behaviour J. P. Araújo, V. S. Amaral, P. B. Tavares, A. A. C. S. Lourenço, F. Lencart-Silva, E. Alves, J. B. Sousa, J. M. Vieira Journal of Magnetism and Magnetic Materials, 226-230, 797 (2001) 50. Non-linear Conduction in LaCaMnO3 Thin Films: Interface Tunneling Effects V. S. Amaral, J. P. Araújo, A. A. C. S. Lourenço, P. B. Tavares, Yu. G. Pogorelov, J. B. Sousa, J. M. Vieira Journal of Magnetism and Magnetic Materials, 226-230, 942 (2001) 51. Anomalous Magnetic Behaviour In La2/3Ca1/3MnO3 Near The Critical Point: Stable Clusters And Crossover To Uniform Ferromagnetism V. S. Amaral, J. P. Araújo, Yu. G. Pogorelov, J. M. B. Lopes dos Santos, P. B. Tavares, A. A. C. S. Lourenço, J. B. Sousa, J. M. Vieira Journal of Magnetism and Magnetic Materials, 226-230, 837 (2001) 52. Hyperfine fields at Cd site on La0.67Cd0.25MnO3 CMR manganites J.P. Araújo, J.G. Correia, V.S. Amaral, P.B. Tavares, F. Lencart-Silva, A.A.C.S. Lourenço, J.B. Sousa, J.M. Vieira, J.C. Soares Hyperfine Interactions, 133, 89 (2001) 53. Magnetic Phases in Gd1-xYx thin films J.P. Araújo, A.M. Pereira, J.A.M. dos Santos, M.A.V. Baptista, J.M. Moreira, V.S. Amaral, J.B. Sousa, S.B.Palmer Journal of Magnetism and Magnetic Materials, 226-230, 1180 (2001) 54. Magnetic probing of tunable Eu3+ local site in organic/inorganic nanohybrids V. S. Amaral, L. D. Carlos e V. de Zea Bermudez IEEE Transactions on Magnetics, 37, 2935 (2001) 55. Discontinuous Transition Effects in Manganites: Magnetization Study in the Paramagnetic Phase V. S. Amaral, J. P. Araújo, Yu. G. Pogorelov, J. B. Sousa, P. B. Tavares, J. M. Vieira Journal of Magnetism and Magnetic Materials, 242-245, 655 (2002) 56. Magnetic behavior of a nonextensive S-spin system: Possible connections to manganites. M. S. Reis, J. P. Araújo, V. S. Amaral, E. K. Lenzi, I.S. Oliveira Physical Review B, 66, 134417 (2002) 57. Substrate and Composition Effects on BSCCO thin Films Deposited by Aerosol-MOCVD P. B. Tavares, V. S. Amaral, J. P. Araújo, M. C. Oliveira, J. M. Vieira Key Engineering Materials, 230-232, 173 (2002) 58. Structure of magnetic POE-siloxane nanohybrids doped with Fe(II) and Fe(III). N.J.O. Silva, K. Dahmouche, C.V. Santilli, V. S. Amaral, L.D. Carlos, V. de Zea Bermudez, A.F. Craievich Journal of Applied Crystallography, 36, 966 (2003) 59. Tricritical Points in La-based Ferromagnetic Manganites V. S. Amaral, J. P. Araújo, Yu. G. Pogorelov, J. B. Sousa, P. B. Tavares, J. M. Vieira, P. A. Algarabel, M. R. Ibarra Journal of Applied Physics, 93, 7646 (2003) 60. Magnetic properties of Fe-doped organic/inorganic nanohybrids N. J. O. Silva, V. S. Amaral, L. D. Carlos, V. de Zea Bermudez Journal of Applied Physics, 93, 6978 (2003) 61. Magnetic phase diagram for a nonextensive system: Experimental connection with manganites M.S. Reis, V.S. Amaral, J.P. Araujo, I.S. Oliveira Physical Review B, 68, 010404 (2003) 62. Magnetocaloric Effect in Manganites: Ferromagnetic and Charge-Ordering Effects M. S. Reis, A. M. Gomes, J. P. Araújo, P. B. Tavares, J. S. Amaral, I. S. Oliveira, V. S. Amaral Materials Science Forum, 455-456, 148 (2004) 63. Nanosized Photonics and Magnetism in Organic-Inorganic Hybrids Materials Luís D. Carlos, Rute A. Sá Ferreira, Nuno J. O. Silva, Vitor S. Amaral and Verónica de Zea Bermudez Materials Science Forum, 455-456, 564 (2004) 64. Charge-Ordering and Magnetoelastic Coupling Effects on The Magnetocaloric Properties of Manganites M. S. Reis, A. M. Gomes, J. P. Araújo, P. B. Tavares, J. S. Amaral, I. S. Oliveira, V. S. Amaral Acta Physica Polonica A 105, 163 (2004) 65. Phase and structural study of self- doped La1-x-yCaxyMnO3+ F. Figueiras , J.P. Araújo, V.S. Amaral, P.B. Tavares , A.B. Lopes and J.M. Vieira Acta Physica Polonica A 105, 173 (2004) 66. First stoichiometric large-pore chromium(III) silicate catalyst Paula Brandão, Anabela Valente, Artur Ferreira, Vítor S. Amaral and João Rocha Microporous and Mesoporous Materials, 69, 209 (2004) 67. Magnetoelastic Coupling Influence on the Magnetocaloric Effect in Ferromagnetic Materials V. S. Amaral, J. S. Amaral Journal of Magnetism and Magnetic Materials, 272-276, 2104 (2004) 68. Structural and Magnetic Study of Self- Doped La1-x-yCax ØyMnO3 F. Figueiras, J.P. Araújo, V.S. Amaral, P. B. Tavares, J. B. Sousa, J. M. Vieira. Journal of Magnetism and Magnetic Materials, 272-276, 1753 (2004) 69. Ferrihydrite antiferromagnetic nanoparticles in a sol-gel derived organic-inorganic matrix. N. J. O. Silva, V. S. Amaral, L. D. Carlos, V. de Zea Bermudez Journal of Magnetism and Magnetic Materials, 272-276, 1549 (2004) 70. Local Probe Studies on LaMnO3+ Using the Angular Correlation Technique. A.M.L. Lopes, J.P. Araújo, E. Rita, J.G. Correia, V.S. Amaral, R. Suryanarayanan and the ISOLDE Colaboration Journal of Magnetism and Magnetic Materials, 272-276, Supplement 1, E1671 (2004) 71. Cadmium Doping at Mn Site in Pr0.5Ca0.5MnO3 A.M.L Lopes, J.P. Araújo, A.M. Gomes, M.S. Reis, V.S. Amaral, P.B. Tavares Journal of Magnetism and Magnetic Materials, 272-276, 1767 (2004) 72. Perturbed Angular Correlation Study of Pr1-xCaxMnO3 A.M.L. Lopes, J.P. Araújo, E. Rita, J.G. Correia, V.S. Amaral, Y. Tomioka, Y. Tokura, R. Suryanarayanan and the ISOLDE Colaboration Journal of Magnetism and Magnetic Materials, 272-276, Supplement 1, E1667 (2004) 73. Positive and ‘Colossal’ Magnetocaloric Effect due to Charge-Ordering in CMR Manganites M. S. Reis, A. M. Gomes, J. P. Araújo, P. B. Tavares, I. S. Oliveira V. S. Amaral Journal of Magnetism and Magnetic Materials, 272-276, 2393 (2004) 74. Magnetic non-extensivity in CMR manganites M. S. Reis, J. P. Araújo, V. S. Amaral, I. S. Oliveira, Journal of Magnetism and Magnetic Materials, 272-276, 1011 (2004) 75. Magnetocaloric Effect on the Pr0.43Gd0.25Ca0.32MnO3 manganite A. M. Gomes, M. S. Reis, J. P. Araújo, P. B. Tavares, I. S. Oliveira V. S. Amaral Journal of Magnetism and Magnetic Materials, 272-276, 2385 (2004) 76. Ion beam studies of single crystalline manganite thin films C. Marques, E. Alves, V. S. Amaral, J. P. Araújo, G. Cristiani, H.-U. Habermeier and J. M. Vieira Nuclear Instruments & Methods in Physics Research B, 219-220, 933(2004) 77. Effect of presence of an acid catalyst on structure and properties of iron-doped siloxane-polyoxyethylene nanocomposites prepared by sol–gel L.A. Chiavacci, K. Dahmouche, N. J. O. Silva, L.D. Carlos, V. S. Amaral, V. De Zea Bermudez, S. H. Pulcinelli; C.V. Santilli, V. Briois, A. F. Craievich Journal of Non-Crystalline Solids, 345&346, 585–590 (2004) 78. Field tuned magnetocaloric effect in metamagnetic manganite systems A. M. Gomes, F. Garcia, A. P. Guimarães, M. S. Reis and V. S. Amaral Applied Physics Letters, 85, 4974 (2004) 79. Electrical Field Gradient studies on La1-xCdxMnO3+ system J.P. Araújo, A.M.L. Lopes, T. Mendonça, E. Rita, J.G. Correia, V.S. Amaral, and the ISOLDE Collaboration Hyperfine Interactions 158, 347 (2004) 80. Matrix-assisted Formation of Size-Controlled Ferrihydrite in a Siloxane/poly(oxyethylene) Hybrid N. J. O. Silva, V. S. Amaral, L. D. Carlos, J. Rocha, V. de Zea Bermudez, D. Ostrovskii Journal of Materials Chemistry, 15, 484 (2005) 81. Synthesis, characterisation and magnetic properties of copper(II) complexes with 3-hydroxypicolinic acid (HpicOH): the crystal structure of [Cu(picOH)2(BPE)]2•[Cu(picOH)2(BPE)2]•8H2O Penka I. Girginova, Filipe A. Almeida Paz, Helena I. S. Nogueira, Nuno J. O. Silva, Vítor S. Amaral, Jacek Klinowski, and Tito Trindade Journal of Molecular Structure, 737, 221 (2005) 82. Comment on ``Thermoinduced magnetization in nanoparticles of antiferromagnetic materials\\'\\' N.J.O. Silva, L.D. Carlos, and V.S. Amaral Physical Review Letters, 94, 039707 (2005) 83. Synthesis, Characterisation and Magnetic Properties of Cobalt(II) Complexes with 3-Hydroxypicolinic Acid (HpicOH): [Co(picOH)2(H2O)2] and mer-[N(CH3)4][Co(picOH)3].H2O Penka I. Girginova, Filipe A. Almeida Paz, Helena I. S. Nogueira, Nuno J. O. Silva, Vítor S. Amaral, Jacek Klinowski, and Tito Trindade Polyhedron, 24, 563 (2005) 84. Charge-ordering contribution to the magnetic entropy change of (Pr,Ca)MnO3 M.S. Reis, V.S. Amaral, J.S. Amaral, A.M. Gomes, J.P. Araujo, P.B. Tavares and I.S. Oliveira Journal of Magnetism and Magnetic Materials, 290-291, Part 1, 697 (2005) 85. Magnetocaloric effect in Er and Eu-substituted ferromagnetic La-Sr manganites. J. S. Amaral, M.S. Reis, V. S. Amaral, T. Mendonça, J. P. Araújo, M.A. Sá, P. B. Tavares, and J. M. Vieira Journal of Magnetism and Magnetic Materials, 290-291, Part 1, 686 (2005) 86. Magnetic behavior of iron (III) oxyhydroxy nanoparticles in organic–inorganic hybrid matrices N. J. O. Silva, V. S. Amaral, L. D. Carlos, L. Fu, S. Nunes and V. de Zea Bermudez Journal of Magnetism and Magnetic Materials, 290-291, Part 2, 962 (2005) 87. Magnetocaloric effect of the (Pr,Ca)MnO3 manganite at low temperatures A. M. Gomes, F. Garcia, M. S. Reis, V.S. Amaral and A. P. Guimarães Journal of Magnetism and Magnetic Materials, 290-291, Part 1, 694 (2005) 88. Magnetic entropy change of Pr1 - x Cax MnO3 manganites (0.2

Projectos

Boretos Supercondutores: Propriedades e Processamento de Materiais (POCTI/CTM/39340/2001)

CoordenadorFundação para a Ciência e a Tecnologia
supercondutividade compostos covalentes dopagem processamento e modificação de mat

Caracterizacao da conducao termica em nanoescala utilizando metodos de varrimento de sonda para guiar a sintese de ceramicas termoeletricas (NANOCERAMPROBE)

ParticipanteFundação para a Ciência e a Tecnologia

Caracterização de Materiais com Técnicas Nucleares Radioactivas - sinergia e complementaridade aplicadas ao treino e desenvolvimento (CERN/FIS-NUC/0004/2015)

Coordenador LocalFundação para a Ciência e a Tecnologia
Novos Materiais, Escalas e Propriedades Caracterização de materiais à escala nanoscópica Técnicas Nucleares Radioactivas Exóticas Infra-estrutura de Física do Estado Sólido Nuclear

Controlo da escala de tamanho através de "Chimie Douce": de materiais funcionais inorgânicos a hìbridos orgânicos-inorgânicos (POCTI/CTM/46780/2002)

ParticipanteFundação para a Ciência e a Tecnologia
Materiais Funcionais Inorgânicos Chimie Douce HÌbridos Orgânicos-Inorgânicos Luminescente

Desenvolvimento de biomateriais não sinterizáveis à base de fosfatos de cálcio com bi-funcionalidade: regeneração e tratamento de cancro ósseo (2BBone)

ParticipanteFundação para a Ciência e a Tecnologia

Desenvolvimento de camadas nanoestruturadas inteligentes para a deteção de corrosão em estruturas aquáticas (SMARTAQUA)

ParticipanteFundação para a Ciência e a Tecnologia
Corrosion is a result of thermodynamically-driven processed which occur due to the interaction of active metal alloys with the surrounding environment, leading to the degradation of metallic structures. The problem is particularly relevant in maritime offshore structures due to aggressive conditions such as high salinity and humidity. Although t...

Desenvolvimento e investigação fundamental de compostos nano-estratificados de terras raras para aplicações em refrigeração e novos sensores magnéticos-Transições martensíticas induzidas pelo fluído electrónico (POCI/CTM/61284/2004)

Coordenador LocalFundação para a Ciência e a Tecnologia
Refrigeração Magnética Compostos nano-estratificados Transições Martensiticas sensores magnetoestrictivos

Enfrentando os desafios da caraterização de novos materiais e procesos térmicos (RECI/CTM-CER/0336/2012)

CoordenadorFundação para a Ciência e a Tecnologia
Propriedades térmicas de materiais Processos térmicos Termometria Estudos à nano-escala

Estudo de Óxidos com Magnetoresistência Colossal utilizando Isótopos Radioactivos no ISOLDE-CERN (POCTI/FNU/50183/2003)

CoordenadorFundação para a Ciência e a Tecnologia
Tecnicas nucleares em Materiais Acoplamento Magneto-estrutural Materiais Magnéticos Dopantes implantados e Localização

Estudo de Óxidos com Magnetoresistência Colossal utilizando Isótopos Radioactivos no ISOLDE-CERN (POCTI/FNU/49509/2002)

CoordenadorFundação para a Ciência e a Tecnologia
Tecnicas nucleares em Materiais Acoplamento Magneto-estrutural Materiais Magnéticos Dopantes implantados e Localização

Estudo de Óxidos Magnéticos usando Isótopos Radioactivos no ISOLDE-CERN (POCI/FP/81979/2007)

CoordenadorFundação para a Ciência e a Tecnologia
Técnicas Nucleares em Materiais Materiais magnéticos acoplamentos magneto-electro-estruturais sondas radioactivas implantadas e localização

Estudo de Óxidos Magnéticos utilizando Isótopos Radioactivos no ISOLDE-CERN (POCI/FP/63438/2005)

CoordenadorFundação para a Ciência e a Tecnologia
Tecnicas nucleares em Materiais Materiais Magnéticos Acoplamento Magneto-estrutural Dopantes implantados e Localização

Estudo teórico e experimental de propriedades hiperfinas e eletrónicas de materiais multiferróicos (CNR 6818)

CoordenadorFundação para a Ciência e a Tecnologia
This project aims at strengthening the collaboration between the partner groups on the study of multiferroic materials, their surfaces and nanostructures.The combination of complementary theoretical and experimental methods envisages a consistent understanding of the cross relation between local electron density and locally probed hyperfine and ...

Estudos de Materiais Magnéticos em Multiferróicos utilizando Isótopos Radioactivos no ISILDE-CERN (CERN/FP/109357/2009)

CoordenadorFundação para a Ciência e a Tecnologia
Técnicas Nucleares em Materiais Materiais magnéticos e multiferróicos acoplamentos magneto-electro-estruturais sondas radioactivas implantadas

Estudos de Óxidos Magnéticos aplicando Isótopos Radioactivos (ISOLDE-CERN) (POCI/FP/63953/2005)

CoordenadorFundação para a Ciência e a Tecnologia
Técnicas Nucleares em Materiais Materiais Magnéticos acoplamentos magneto-electr-estruturais sondas implantadas e localização

Estudos de óxidos magnéticos e multiferróicos aplicados isótopos radioactivos no ISOLDE-CERN (CERN/FP/83643/2008)

CoordenadorFundação para a Ciência e a Tecnologia
Técnicas Nucleares em Materiais Materiais magnéticos e multiferróicos acoplamentos magneto-electro-estruturais sondas radioactivas implantadas e localização

Estudos de sonda local em junções Metal/Óxido (CERN/FP/109325/2009)

ParticipanteFundação para a Ciência e a Tecnologia
Local probe nanostructures Metal/ Oxide junction high-k materials

Experiências de Correlações Angulares Perturbadas e de Canalização de Electrões no ISOLDE-CERN - investigação aplicada a materiais com técnicas nucleares, formação e desenvolvimento (CERN/FP/116320/2010)

Coordenador LocalFundação para a Ciência e a Tecnologia
New Materials & New Properties: New research Nanoscopic Material´s Characterization Emission Channeling & Perturbed Ang. Correlations Nuclear Solid State Physics infrastructure

Experiências de Correlações Angulares Perturbadas e de Canalização de Electrões no ISOLDE-CERN - investigaçãoaplicada a materiais com técnicas nucleares , formação e desenvolvimento (CERN/FP/123585/2011)

Coordenador LocalFundação para a Ciência e a Tecnologia
New Materials & New Properties Nanoscopic Materials Characterization Emission Channeling & Perturbed Ang. Correlations Nuclear Solid State Physics infrastructure

Exploração de métodos de nano-fabricação de magnetes permanentes isentos de terras raras Si-Alnico de alta coercividade (EXPL/CTM-NAN/1614/2013)

ParticipanteFundação para a Ciência e a Tecnologia
Magnetes Permanentes Nano-fabricação Coercividade magnética Sustentabilidade de recursos estratégicos

Interaction and Dynamics of add-atoms with 2-Dimensional Structures (IS585/ISOLDE)

CoordenadorOther International

Investigação em Materiais com Isótopos e Técnicas Nucleares Radioativas no ISOLDE-CERN (InvMat @ ISOLDE)

Coordenador LocalFundação para a Ciência e a Tecnologia

Lattice Location of Transition Metals in Semiconductors (IS368/ISOLDE)

Coordenador LocalOther International

Micro e nanoestruturas com efeito magnetoestritivo gigante: produção, optimização e aplicações em dispositivos multifuncionais (Strictive4Device) (PTDC/CTM-NAN/115125/2009)

Coordenador LocalFundação para a Ciência e a Tecnologia
magnetostricitive materials functionalization devices thin films, micro and nanostructures

Modulação magneto-estrutural em cerâmicas do tipo perovskite com correlações electrónicas fortes (POCTI/CTM/35462/1999)

ParticipanteFundação para a Ciência e a Tecnologia
Cerâmicas Filmes finos Magnetorresistividade Espectroscopias de sonda local

Multiferroicos e magnetoeléctricos para spintrónica: barreiras e interfaces (PTDC/CTM/099415/2008)

Coordenador LocalFundação para a Ciência e a Tecnologia
Multiferroic and magnetoelectric materials Heterostructures Spin transport Tunneling

MULTIFOX: Modificação e estudo à escala nanométrica de óxidos multiferróicos (PTDC/FIS/105416/2008)

CoordenadorFundação para a Ciência e a Tecnologia
multiferróico magnético microscopia força piezoeléctrica materiais nanoestruturados

Nanomateriais para captura de iões de metais poluentes: eficiência, selectividade e reciclagem (PTDC/CTM-NAN/120668/2010)

ParticipanteFundação para a Ciência e a Tecnologia
Nanopartículas Nanomagnetismo Colóides e interfaces Adsorção química

Nanoquímica de compósitos magnéticos/luminiscentes para aplicações de diagnóstico médico in vitro (PTDC/QUI/67712/2006)

ParticipanteFundação para a Ciência e a Tecnologia
Nanopartículas Nanocompósitos Magnetismo/Luminescência Bioconjugação de anticorpos

Portugal no Isolde: Investigação em física de Materais e Nuclear com isótopos e Técnicas Radioativas; (ISOLDE 2017)

Coordenador LocalFundação para a Ciência e a Tecnologia
Novos Materiais, Propriedades à Escala Nanoscópica Física Nuclear Fundamental Experimental Técnicas Nucleares Radioactivas Exóticas Infra-estrutura de Física do Estado Sólido Nuclear

Radioactive probe studies of coordination mechanisms of heavy metal ions from natural waters to functionalized magnetic nanoparticles (CERN-INTC-2009-002/I-081)

CoordenadorOther International
It is planned to initiate investigations on the properties of magnetic nanoparticles with respect to their ability to absorb heavy metals from aqueous solutions. Isotopes of the elements Hg, Cd, and Pb will be implanted in solidifiedwater which already contains the nanoparticles or to which they can be added later on. This is an established proc...

Radioactive probe studies of coordination modes of heavy metal ions from natural waters to functionalized magnetic nanoparticles (IS515/ISOLDE)

CoordenadorOther International

Studies of Colossal Magnetoresistive Oxides with Radioactive Isotopes (IS390/ISOLDE)

CoordenadorOther International

Study of Local Correlations of Magnetic and Multiferroic Compounds (IS487/ISOLDE)

CoordenadorOther International

Transferência de Energia de Polímetros Electroluminescentes para Dopantes Fosforescentes (POCTI/CTM/40063/2001)

ParticipanteFundação para a Ciência e a Tecnologia
LEDs de polímero Polímeros Electroluminescentes Dopantes fosforescentes Transferência de energia

Publicações

Exploiting Radioactive Isotopes: from Pollutant Tracking to Solid State Studies Using a Combined Ab Initio and PAC Approach

Amorim, CO; Goncalves, JN; Amaral, VS
2020, EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 2020, 19, 1822-1833.
ISBN: 1099-0682

In-Silico Thermodynamic Description of Heusler Compounds Applied to Magnetocalorics by Monte Carlo Simulations Starting from Ab-Initio

Amorim, CO; Goncalves, JN; Amaral, VS; Amaral, JS
2020, EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 2020, 14, 1271-1277.
ISBN: 1099-0682

Stealth Magnetoliposomes Based on Calcium-Substituted Magnesium Ferrite Nanoparticles for Curcumin Transport and Release

Cardoso, BD; Rodrigues, ARO; Almeida, BG; Amorim, CO; Amaral, VS; Castanheira, EMS; Coutinho, PJG
2020, INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 21, 10.
ISBN: 1422-0067

Cooling by sweeping: A new operation method to achieve ferroic refrigeration without fluids or thermally switchable components

Silva, DJ; Amaral, JS; Amaral, VS
2019, INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 101, 98-105.
ISBN: 1879-2081

Link of Weak Ferromagnetism to Emergence of Topological Vortices in Bulk Ceramics of h-LuMnxO3 Manganite

Baghizadeh, A; Vaghefi, PM; Alikin, DO; Amaral, JS; Amaral, VS; Vieira, JM
2019, JOURNAL OF PHYSICAL CHEMISTRY C, 123, 10, 6158-6166.

On the Optimization of Magneto-Volume Coupling for Practical Applied Field Magnetic Refrigeration

Davarpanah, A; Belo, JH; Amaral, VS; Amaral, JS
2019, PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 256, 3.
ISBN: 1521-3951

Enhancing the temperature span of thermal switch-based solid state magnetic refrigerators with field sweeping

Silva, DJ; Ventura, J; Amaral, JS; Amaral, VS
2019, INTERNATIONAL JOURNAL OF ENERGY RESEARCH, 43, 2, 742-748.
ISBN: 1099-114X

Improvement of thermoelectric properties of Ca0.9Gd0.1MnO3 by powder engineering through K2CO3 additions

Ferreira, NM; Ferro, MC; Sarabando, AR; Ribeiro, A; Davarpanah, A; Amaral, V; Madre, MA; Kovalevsky, AV; Torres, MA; Costa, FM; Sotelo, A
2019, JOURNAL OF MATERIALS SCIENCE, 54, 4, 3252-3261.
ISBN: 1573-4803

Can contaminated waters or wastewater be alternative sources for technology-critical elements? The case of removal and recovery of lanthanides

Afonso, EL; Carvalho, L; Fateixa, S; Amorim, CO; Amaral, VS; Vale, C; Pereira, E; Silva, CM; Trindade, T; Lopes, CB
2019, JOURNAL OF HAZARDOUS MATERIALS, 380.
ISBN: 1873-3336

Synthesis of thermoelectric magnesium-silicide pastes for 3D printing, electrospinning and low-pressure spray

Marques, AC; Miglietta, D; Gaspar, G; Baptista, AC; Gaspar, A; Perdigao, P; Soares, I; Bianchi, C; Sousa, D; Faustino, BMM; Amaral, VS; Santos, T; Goncalves, AP; da Silva, RC; Giorgis, F; Ferreira, I
2019, MATERIALS FOR RENEWABLE AND SUSTAINABLE ENERGY, 8, 4.
ISBN: 2194-1467

Temperature dependent thermal conductivity of magnetocaloric materials: Impact assessment on the performance of active magnetic regenerative refrigerators

Silva, DJ; Davarpanah, A; Amaral, JS; Amaral, VS
2019, INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 106, 181-187.
ISBN: 1879-2081

Modeling and computing magnetocaloric systems using the Python framework heatrapy

Silva, DJ; Amaral, JS; Amaral, VS
2019, INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 106, 278-282.
ISBN: 1879-2081

Magnetoliposomes Containing Calcium Ferrite Nanoparticles for Applications in Breast Cancer Therapy

Pereira, DSM; Cardoso, BD; Rodrigues, ARO; Amorim, CO; Amaral, VS; Almeida, BG; Queiroz, MJRP; Martinho, O; Baltazar, F; Calhelha, RC; Ferreira, ICFR; Coutinho, PJG; Castanheira, EMS
2019, PHARMACEUTICS, 11, 9.
ISBN: 1999-4923

Electric Field Induced Room Temperature Null to High Spin State Switching: A Computational Prediction

Amorim, CO; Amaral, JS; Goncalves, JN; Amaral, VS
2019, ADVANCED THEORY AND SIMULATIONS, 2, 4.
ISBN: 2513-0390

Optical fiber fuse effect based sensor for magnetic field monitoring

Alberto, N; Domingues, MF; Belo, JH; Marques, C; Antunesa, P; Amaral, V; Andre, P
2019, OPTICAL SENSORS 2019, 11028.
ISBN: 1996-756X

Enhancement of the dielectric permittivity and magnetic properties of Dy substituted strontium titanate ceramics

Tkach, A; Amaral, JS; Zlotnik, S; Amaral, VS; Vilarinho, PM
2018, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 38, 2, 605-611.

Ultra sensitive quantification of Hg2+ sorption by functionalized nanoparticles using radioactive tracker spectroscopy

Amorim, CO; Goncalves, JN; Tavares, DS; Fenta, AS; Lopes, CB; Pereira, E; Trindade, T; Correia, JG; Amaral, VS
2018, MICROCHEMICAL JOURNAL, 138, 418-423.

Nanoscale analysis of dispersive ferroelectric domains in bulk of hexagonal multiferroic ceramics

Baghizadeh, A; Vieira, JM; Stroppa, DG; Willinger, MG; Amaral, VS
2018, MATERIALS CHARACTERIZATION, 145, 347-352.

Enhancement of physical and reaction to fire properties of crude glycerol polyurethane foams filled with expanded graphite

Gama, NV; Silva, R; Mohseni, F; Davarpanah, A; Amaral, VS; Ferreira, A; Barros-Timmons, A
2018, POLYMER TESTING, 69, 199-207.

Volume dependence of magnetic properties in Co2Cr1-xYxGa (Y= Ti-Ni) Heusler alloys: A first-principles study

Goncalves, JN; Fortunato, NM; Amaral, JS; Amaral, VS
2017, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 428, 362-367.

Interaction of multiferroic properties and interfaces in hexagonal LuMnO3 ceramics

Baghizadeh, A; Vieira, JM; Stroppa, DG; Vaghefi, PM; Graca, MP; Amaral, JS; Willinger, MG; Amaral, VS
2017, JOURNAL OF PHYSICS D-APPLIED PHYSICS, 50, 5.

Effect of lattice mismatch on the magnetic properties of nanometer-thick La0.9Ba0.1MnO3 (LBM) films and LBM/BaTiO3/LBM heterostructures

Vaghefi, PM; Baghizadeh, A; Willinger, M; Lourenco, AACS; Amaral, VS
2017, APPLIED SURFACE SCIENCE, 425, 988-995.

Interdiffusion Processes in High-Coercivity RF-Sputtered Alnico Thin Films on Si Substrates

Mohseni, F; Baghizadeh, A; Lourenco, AACS; Pereira, MJ; Amaral, VS; Vieira, JM; Amaral, JS
2017, JOM, 69, 8, 1427-1431.

Development of ferroelectric domains and topological defects in vacancy doped ceramics of h-LuMnO3

Baghizadeh, A; Vieira, JM; Vaghefi, PM; Willinger, MG; Amaral, VS
2017, JOURNAL OF APPLIED PHYSICS, 122, 4.

Thickness dependence of microstructure in thin La0.7Sr0.3MnO3 films grown on (100) SrTiO3 substrate

Vaghefi, PM; Baghizadeh, A; Willinger, MG; Pereira, MJ; Mota, DA; Almeida, BG; Moreira, JA; Amaral, VS
2017, JOURNAL OF PHYSICS D-APPLIED PHYSICS, 50, 39.

Giant Strain and Induced Ferroelectricity in Amorphous BaTiO3 Films under Poling

Vaghefi, PM; Baghizadeh, A; Lourenco, AACS; Amaral, VS; Kholkin, AL
2017, MATERIALS, 10, 9.

Solvent-Free Microwave-Induced Oxidation of Alcohols Catalyzed by Ferrite Magnetic Nanoparticles

Martins, NMR; Martins, LMDRS; Amorim, CO; Amaral, VS; Pombeiro, AJL
2017, CATALYSTS, 7, 7.

Dielectric spectroscopy and magnetometry investigation of Gd-doped strontium titanate ceramics

Tkach, A; Amaral, JS; Vitor, SAB; Vilarinho, PM
2017, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 37, 6, 2391-2397.
ISBN: 1873-619X

Novel multiferroic state and ME enhancement by breaking the AFM frustration in LuMn1-xO3

Figueiras, FG; Karpinsky, D; Tavares, PB; Goncalves, JN; Yanez-Vilar, S; Dos Santos, AFM; Franz, A; Tovar, M; Moreira, JA; Amaral, VS
2017, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 19, 2, 1335-1341.
ISBN: 1463-9084

Towards conductive textiles: coating polymeric fibres with graphene

Neves, AIS; Rodrigues, DP; De Sanctis, A; Alonso, ET; Pereira, MS; Amaral, VS; Melo, LV; Russo, S; de Schrijver, I; Alves, H; Craciun, MF
2017, SCIENTIFIC REPORTS, 7.

Insights into the physical properties of biobased polyurethane/expanded graphite composite foams

Gama, N; Costa, LC; Amaral, V; Ferreira, A; Barros-Timmons, A
2017, COMPOSITES SCIENCE AND TECHNOLOGY, 138, 24-31.
ISBN: 1879-1050

Development of a biocompatible magnetic nanofluid by incorporating SPIONs in Amazonian oils

Gaspar, AS; Wagner, FE; Amaral, VS; Lima, SAC; Khomchenko, VA; Santos, JG; Costa, BFO; Duraes, L
2017, SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 172, 135-146.

First-Row-Transition Ion Metals(II)-EDTA Functionalized Magnetic Nanoparticles as Catalysts for Solvent-Free Microwave-Induced Oxidation of Alcohols

Martins, NMR; Martins, LMDRS; Amorim, CO; Amaral, VS; Pombeiro, AJL
2017, CATALYSTS, 7, 11.

Assessing Segregation Effects on Multiferroic Properties of Antiferromagnetic - Weak Ferromagnetic Coupled Sy stems by Analytical HRTEM

M. Vieira, A. Baghizadeh, J. S. Amaral, J. N. Gonalves, B. A. Almeida, M-G. Willinger, V. S. Amaral
2016, Microscopy and Microanalysis, 22, S4, 58-59.

Breaking the geometric magnetic frustration in controlled off-stoichiometric LuMn1+zO3+delta compounds

Figueiras, FG; Karpinsky, D; Tavares, PB; Das, S; Leitao, JV; Bruck, EH; Moreira, JA; Amaral, VS
2016, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 18, 19, 13519-13523.

Effect of processing conditions on the properties of recycled cathode ray tube glass foams

Barbosa, ARJ; Lopes, AAS; Sequeira, SIH; Oliveira, JP; Davarpanah, A; Mohseni, F; Amaral, VS; Monteiro, RCC
2016, JOURNAL OF POROUS MATERIALS, 23, 6, 1663-1669.

High thermoelectric performance in Bi2-xPbxBa2Co2Oy promoted by directional growth and annealing

Madre, MA; Costa, FM; Ferreira, NM; Costa, SIR; Rasekh, S; Torres, MA; Diez, JC; Amaral, VS; Amaral, JS; Sotelo, A
2016, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 36, 1, 67-74.

Magnetoelectric effect probe through ppm Fe doping in BaTiO3

Figueiras, FG; Amorim, CO; Amaral, J; Moreira, JA; Tavares, PB; Alves, E; Amaral, VS
2016, JOURNAL OF ALLOYS AND COMPOUNDS, 661, 495-500.

Nano-Localized Thermal Analysis and Mapping of Surface and Sub-Surface Thermal Properties Using Scanning Thermal Microscopy (SThM)

Pereira, MJ; Amaral, JS; Silva, NJO; Amaral, VS
2016, MICROSCOPY AND MICROANALYSIS, 22, 6, 1270-1280.

Nanodomains Coupled to Ferroelectric Domains Induced by Lattice Distortion in Self-Doped LuMnxO3 +/-delta Hexagonal Ceramics

Baghizadeh, A; Vieira, JM; Goncalves, JN; Willinger, MG; Ferro, MC; Amaral, VS
2016, JOURNAL OF PHYSICAL CHEMISTRY C, 120, 38, 21897-21904.

Tailoring Ca3Co4O9 microstructure and performances using a transient liquid phase sintering additive

Sotelo, A; Costa, FM; Ferreira, NM; Kovalevsky, A; Ferro, MC; Amaral, VS; Amaral, JS; Rasekh, S; Torres, MA; Madre, MA; Diez, JC
2016, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 36, 4, 1025-1032.

The Cu-68m/Cu-68 isotope as a new probe for hyperfine studies: The nuclear moments

Fenta, AS; Pallada, S; Correia, JG; Stachura, M; Johnston, K; Gottberg, A; Gerami, AM; Roder, J; Grawe, H; Brown, BA; Koster, U; Mendonca, TM; Ramos, JP; Marsh, BA; Goodacre, TD; Amaral, VS; Pereira, LMC; Borge, MJG; Haas, H
2016, EPL, 115, 6.

Scanning thermal microscopy: Nano-localized thermal analysis and mapping of surface and subsurface thermal properties

Pereira M.J., Amaral J.S., Silva N.J.O., Amaral V.S.
2016, Microscopy and Microanalysis, 22, 2-3.

Peculiar Magnetoelectric Coupling in BaTiO3:Fe-113 ppm Nanoscopic Segregations

Amorim, CO; Figueiras, F; Amaral, JS; Vaghefi, PM; Tavares, PB; Correia, MR; Baghizadeh, A; Alves, E; Rocha, J; Amaral, VS
2015, ACS APPLIED MATERIALS & INTERFACES, 7, 44, 24741-24747.

Crystal structure, magnetic and dielectric behavior of h-LuMnxO3 +/-delta ceramics (0.95 <= x <= 1.04)

Baghizadeh, A; Vieira, JM; Amaral, JS; Graca, MP; Soares, MR; Mota, DA; Amaral, VS
2015, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 395, 303-311.

Cobalt aluminate nanoparticles supported on MIL-101 structure: catalytic performance investigation

Granadeiro, CM; Karmaoui, M; Correia, E; Juliao, D; Amaral, VS; Silva, NJO; Cunha-Silva, L; Balula, SS
2015, RSC ADVANCES, 5, 6, 4175-4183.

Local bias induced ferroelectricity in manganites with competing charge and orbital order states

Figueiras, FGN; Bdikin, IK; Amaral, VBS; Kholkin, AL
2014, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 16, 10, 4977-4981.

Hyperfine local probe study of alkaline-earth manganites SrMnO3 and BaMnO3

Goncalves, JN; Amaral, VS; Correia, JG; Lopes, AML; Araujo, JP; Tavares, PB
2014, JOURNAL OF PHYSICS-CONDENSED MATTER, 26, 21.

Non-aqueous sol-gel synthesis through a low-temperature solvothermal process of anatase showing visible-light photocatalytic activity

Karmaoui, M; Tobaldi, DM; Skapin, AS; Pullar, RC; Seabra, MP; Labrincha, JA; Amaral, VS
2014, RSC ADVANCES, 4, 87, 46762-46770.

Disorder effects in giant magnetocaloric materials

Amaral, JS; Amaral, VS
2014, PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 211, 5, 971-974.

Thermodynamics of the 2-D Ising Model From a Random Path Sampling Method

Amaral, JS; Goncalves, JN; Amaral, VS
2014, IEEE TRANSACTIONS ON MAGNETICS, 50, 11.

General Route to Synthesize of Metal (Ni, Co, Mn, Fe) Oxide Nanostructure and Their Optical and Magnetic Behaviour

Chakrabarty, S; De, K; Das, S; Amaral, VS; Chatterjee, K
2014, JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 14, 6, 4236-4244.

Perturbed Angular Correlation Study of the Static and Dynamic Aspects of Cadmium and Mercury Atoms Inside and Attached to a C-60 Fullerene Cage

Das, SK; Guin, R; Banerjee, D; Johnston, K; Das, P; Butz, T; Amaral, VS; Correia, JG; Barbosa, MB
2014, ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 69, 10-Nov, 611-618.

Local probing of multiferroics: First-principles study of hyperfine parameters in YMnO3 and YMn2O5

Goncalves, JN; Amaral, VS; Correia, JG; Stroppa, A; Fenta, AS; Baghizadeh, A; Picozzi, S
2014, JEMS 2013 - JOINT EUROPEAN MAGNETIC SYMPOSIA, 75.

Magnetovolume Effects in Heusler Compounds via First-Principles Calculations

Goncalves, JN; Amaral, JS; Amaral, VS
2014, IEEE TRANSACTIONS ON MAGNETICS, 50, 11.

Local probe studies in the weakly Jahn- Teller distorted LaMnO3.08 manganite

Lopes, AML; Correia, JG; Amaral, VS; Araujo, JP
2014, PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 251, 3, 565-568.

Formation stages of bcc (Fe44Co44)Sn-12 extended solid solution by mechanical alloying

Loureiro, JM; Costa, BFO; Malaman, B; Le Caer, G; Das, S; Amaral, VS
2014, JOURNAL OF ALLOYS AND COMPOUNDS, 615, S559-S563.

Unravelling the effect of SrTiO3 antiferrodistortive phase transition on the magnetic properties of La0.7Sr0.3MnO3 thin films

Mota, DA; Barcelay, YR; Senos, AMR; Fernandes, CM; Tavares, PB; Gomes, IT; Sa, P; Fernandes, L; Almeida, BG; Figueiras, F; Vaghefi, PM; Amaral, VS; Almeida, A; de la Cruz, JP; Moreira, JA
2014, JOURNAL OF PHYSICS D-APPLIED PHYSICS, 47, 43.

Structural and Electromagnetic Properties of Ni-Mn-Ga Thin Films Deposited on Si Substrates

Pereira, MJ; Lourenco, AACS; Amaral, VS
2014, JEMS 2013 - JOINT EUROPEAN MAGNETIC SYMPOSIA, 75.

Effect of Ni precursor solution concentration on the magnetic properties and exchange bias of Ni-NiO nanoparticulate systems

Roy, A; De Toro, JA; Amaral, VS; Marques, DP; Ferreira, JMF
2014, JOURNAL OF APPLIED PHYSICS, 116, 9.

Exchange bias beyond the superparamagnetic blocking temperature of the antiferromagnet in a Ni-NiO nanoparticulate system

Roy, A; De Toro, JA; Amaral, VS; Muniz, P; Riveiro, JM; Ferreira, JMF
2014, JOURNAL OF APPLIED PHYSICS, 115, 7.

Thermometry at the nanoscale using lanthanide-containing organic-inorganic hybrid materials

Brites, CDS; Lima, PP; Silva, NJO; Millan, A; Amaral, VS; Palacio, F; Carlos, LD
2013, JOURNAL OF LUMINESCENCE, 133, 230-232.

Strain induced enhanced ferromagnetic behavior in inhomogeneous low doped La0.95Sr0.05MnO3+delta

Das, S; Amaral, JS; De, K; Willinger, M; Goncalves, JN; Roy, A; Dhak, P; Giri, S; Majumder, S; Silva, CJR; Gomes, MJM; Mahapatra, PK; Amaral, VS
2013, APPLIED PHYSICS LETTERS, 102, 11.

Synthesis of cobalt aluminate nanopigments by a non-aqueous sol-gel route

Karmaoui, M; Silva, NJO; Amaral, VS; Ibarra, A; Millan, A; Palacio, F
2013, NANOSCALE, 5, 10, 4277-4283.

Shell pressure on the core of MnO/Mn3O4 core/shell nanoparticles

Silva, NJO; Karmaoui, M; Amaral, VS; Puente-Orench, I; Campo, J; da Silva, I; Ibarra, A; Bustamante, R; Millan, A; Palacio, F
2013, PHYSICAL REVIEW B, 87, 22.

Room temperature structure and multiferroic properties in Bi0.7La0.3FeO3 ceramics

Carvalho, TT; Fernandes, JRA; de la Cruz, JP; Vidal, JV; Sobolev, NA; Figueiras, F; Das, S; Amaral, VS; Almeida, A; Moreira, JA; Tavares, PB
2013, JOURNAL OF ALLOYS AND COMPOUNDS, 554, 97-103.

Ratiometric highly sensitive luminescent nanothermometers working in the room temperature range. Applications to heat propagation in nanofluids

Brites, CDS; Lima, PP; Silva, NJO; Millan, A; Amaral, VS; Palacio, F; Carlos, LD
2013, NANOSCALE, 5, 16, 7572-7580.

Efficient sorbents based on magnetite coated with siliceous hybrid shells for removal of mercury ions

Tavares, DS; Daniel-da-Silva, AL; Lopes, CB; Silva, NJO; Amaral, VS; Rocha, J; Pereira, E; Trindade, T
2013, JOURNAL OF MATERIALS CHEMISTRY A, 1, 28, 8134-8143.

Jahn-Teller distortion relaxation across the LaMnO3+Delta phase diagram

Lopes, AML; Amaral, VS; Correia, JG; Araujo, JP
2013, JOURNAL OF PHYSICS-CONDENSED MATTER, 25, 38.

Organic-Inorganic Eu3+/Tb3+ codoped hybrid films for temperature mapping in integrated circuits

Brites, CDS; Lima, PP; Silva, NJO; Millan, A; Amaral, VS; Palacio, F; Carlos, LD
2013, FRONTIERS IN CHEMISTRY, 1.

Co-precipitation of a Ni-Zn ferrite precursor powder: Effects of heat treatment conditions and deagglomeration on the structure and magnetic properties

Olhero, SM; Soma, D; Amaral, VS; Button, TW; Alves, FJ; Ferreira, JMF
2012, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 32, 10, 2469-2476.

Magnetoelectric coupling in multiferroic heterostructure of rf-sputtered Ni-Mn-Ga thin film on PMN-PT

Teferi, MY; Amaral, VS; Lounrenco, AC; Das, S; Amaral, JS; Karpinsky, DV; Soares, N; Sobolev, NA; Kholkin, AL; Tavares, PB
2012, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 324, 11, 1872-1876.

Magnetic and electrical transport properties in the self-doped manganite La0.9Mn0.9M0.1O3 (M=Mn, Zn and Ti)

De, K; Das, S; Roy, A; Amaral, VS; Majumder, S; Giri, S; Mahapatra, PK
2012, PHYSICA B-CONDENSED MATTER, 407, 13, 2442-2446.

Organic-inorganic hybrid materials based on iron(III)-polyoxotungstates and 1-butyl-3-methylimidazolium cations

Santos, FM; Brandao, P; Felix, V; Domingues, MRM; Amaral, JS; Amaral, VS; Nogueira, HIS; Cavaleiro, AMV
2012, DALTON TRANSACTIONS, 41, 39, 12145-12155.

Thermometry at the nanoscale

Brites, CDS; Lima, PP; Silva, NJO; Millan, A; Amaral, VS; Palacio, F; Carlos, LD
2012, NANOSCALE, 4, 16, 4799-4829.

On the Curie temperature dependency of the magnetocaloric effect

Belo, JH; Amaral, JS; Pereira, AM; Amaral, VS; Araujo, JP
2012, APPLIED PHYSICS LETTERS, 100, 24.

On the Curie temperature dependency of the magnetocaloric effect (vol 100, 242407, 2012)

Belo, JH; Amaral, JS; Pereira, AM; Amaral, VS; Araujo, JP
2012, APPLIED PHYSICS LETTERS, 101, 7.

Mn doping-induced structural and magnetic transformations in the antiferroelectric phase of the Bi1-xNdxFeO3 perovskites

Khomchenko, VA; Troyanchuk, IO; Maria, TMR; Karpinsky, DV; Das, S; Amaral, VS; Paixao, JA
2012, JOURNAL OF APPLIED PHYSICS, 112, 6.

A-site disorder driven sharp field-induced transition and collapse of charge ordering in Sm1/2Ca1/2-xSrxMnO3

Sabyasachi, S; Karmakar, A; Majumdar, S; Giri, S; Das, S; Amaral, VS
2012, JOURNAL OF APPLIED PHYSICS, 112, 7.

Structural transitions and unusual magnetic behavior in Mn-doped Bi1-xLaxFeO3 perovskites

Khomchenko, VA; Troyanchuk, IO; Karpinsky, DV; Das, S; Amaral, VS; Tovar, M; Sikolenko, V; Paixao, JA
2012, JOURNAL OF APPLIED PHYSICS, 112, 8.

Enhanced ferromagnetism and glassy state in phase separated La0.95Sr0.05MnO3+delta

De, K; Das, S; Roy, A; Dhak, P; Willinger, M; Amaral, JS; Amaral, VS; Giri, S; Majumder, S; Silva, CJR; Gomes, MJM; Mahapatra, PK
2012, JOURNAL OF APPLIED PHYSICS, 112, 10.

Tailoring the magnetism of Tb5Si2Ge2 compounds by La substitution

Belo, JH; Pereira, AM; Araujo, JP; de la Cruz, C; dos Santos, AM; Goncalves, JN; Amaral, VS; Morellon, L; Ibarra, MR; Algarabel, PA; Magen, C
2012, PHYSICAL REVIEW B, 86, 1.

Ab initio study of the relation between electric polarization and electric field gradients in ferroelectrics

Goncalves, JN; Stroppa, A; Correia, JG; Butz, T; Picozzi, S; Fenta, AS; Amaral, VS
2012, PHYSICAL REVIEW B, 86, 3.

Glassy magnetic phase driven by short-range charge and magnetic ordering in nanocrystalline La1/3Sr2/3FeO3-delta: Magnetization, Mossbauer, and polarized neutron studies

Sabyasachi, S; Patra, M; Majumdar, S; Giri, S; Das, S; Amaral, VS; Iglesias, O; Borghols, W; Chatterji, T
2012, PHYSICAL REVIEW B, 86, 10.

Dynamic off-centering of Cr3+ ions and short-range magneto-electric clusters in CdCr2S4

Oliveira, GNP; Pereira, AM; Lopes, AML; Amaral, JS; dos Santos, AM; Ren, Y; Mendonca, TM; Sousa, CT; Amaral, VS; Correia, JG; Araujo, JP
2012, PHYSICAL REVIEW B, 86, 22.

Electrical assisted laser floating zone (EALFZ) growth of 2212-BSCCO superconducting fibres

Carrasco, MF; Amaral, VS; Silva, RF; Costa, FM
2011, APPLIED SURFACE SCIENCE, 257, 12, 5283-5286.

Lanthanide-based luminescent molecular thermometers

Brites, CDS; Lima, PP; Silva, NJO; Millan, A; Amaral, VS; Palacio, F; Carlos, LD
2011, NEW JOURNAL OF CHEMISTRY, 35, 6, 1177-1183.

Unveiling the (De)coupling of magnetostructural transition nature in magnetocaloric R5Si2Ge2 (R = Tb, Gd) materials

Pereira, AM; Kampert, E; Moreira, JM; Zeitler, U; Belo, JH; Magen, C; Algarabel, PA; Morellon, L; Ibarra, MR; Goncalves, JN; Amaral, JS; Amaral, VS; Sousa, JB; Araujo, JP
2011, APPLIED PHYSICS LETTERS, 99, 13.

Hyperfine interactions in MnAs studied by perturbed angular correlations of gamma-rays using the probe Br-77 -> Se-77 and first-principles calculations for MnAs and other Mn pnictides

Goncalves, JN; Amaral, VS; Correia, JG; Lopes, AML
2011, PHYSICAL REVIEW B, 83, 10.

Local distortions in multiferroic AgCrO2 triangular spin lattice

Lopes, AML; Oliveira, GNP; Mendonca, TM; Moreira, JA; Almeida, A; Araujo, JP; Amaral, VS; Correia, JG
2011, PHYSICAL REVIEW B, 84, 1.

Shifted loops and coercivity from field-imprinted high-energy barriers in ferritin and ferrihydrite nanoparticles

Silva, NJO; Amaral, VS; Urtizberea, A; Bustamante, R; Millan, A; Palacio, F; Kampert, E; Zeitler, U; de Brion, S; Iglesias, O; Labarta, A
2011, PHYSICAL REVIEW B, 84, 10.

Effects of Phonon Confinement on Anomalous Thermalization, Energy Transfer, and Upconversion in Ln(3+)-Doped Gd2O3 Nanotubes

Macedo, AG; Ferreira, RAS; Ananias, D; Reis, MS; Amaral, VS; Carlos, LD; Rocha, J
2010, ADVANCED FUNCTIONAL MATERIALS, 20, 4, 624-634.

A Luminescent Molecular Thermometer for Long-Term Absolute Temperature Measurements at the Nanoscale

Brites, CDS; Lima, PP; Silva, NJO; Millan, A; Amaral, VS; Palacio, F; Carlos, LD
2010, ADVANCED MATERIALS, 22, 40, 4499-4504.

Silica coated magnetite particles for magnetic removal of Hg2+ from water

Girginova, PI; Daniel-Da-Silva, AL; Lopes, CB; Figueira, P; Otero, M; Amaral, VS; Pereira, E; Trindade, T
2010, JOURNAL OF COLLOID AND INTERFACE SCIENCE, 345, 2, 234-240.

On estimating the magnetocaloric effect from magnetization measurements

Amaral, JS; Amaral, VS
2010, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 322, 9-12, 1552-1557.

First principles calculations of hyperfine parameters on the Ca manganite with substitutional Cd-modeling of a PAC experiment

Goncalves, JN; Haas, H; Lopes, AML; Amaral, VS; Correia, JG
2010, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 322, 9-12, 1170-1173.

Estimating spontaneous magnetization from a mean field analysis of the magnetic entropy change

Amaral, JS; Silva, NJO; Amaral, VS
2010, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 322, 9-12, 1569-1571.

Synthesis and characterisation of novel ruthenium multi-substituted polyoxometalates: alpha,beta-[SiW9O37Ru4(H2O)(3)Cl-3](7-)

Gamelas, JAF; Carapuca, HM; Balula, MS; Evtuguin, DV; Schlindwein, W; Figueiras, FG; Amaral, VS; Cavaleiro, AMV
2010, POLYHEDRON, 29, 16, 3066-3073.

Prediction of realistic entropy behavior from mixed state magnetization data for first order phase transition materials

Das, S; Amaral, JS; Amaral, VS
2010, JOURNAL OF APPLIED PHYSICS, 107, 9.

Handling mixed-state magnetization data for magnetocaloric studies-a solution to achieve realistic entropy behaviour

Das, S; Amaral, JS; Amaral, VS
2010, JOURNAL OF PHYSICS D-APPLIED PHYSICS, 43, 15.

Study of Ni-2-Mn-Ga phase formation by magnetron sputtering film deposition at low temperature onto Si substrates and LaNiO3/Pb(Ti,Zr)O-3 buffer

Figueiras, F; Rauwel, E; Amaral, VS; Vyshatko, N; Kholkin, AL; Soyer, C; Remiens, D; Shvartsman, VV; Borisov, P; Kleemann, W
2010, JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 28, 1, 6-10.

Room temperature giant magnetoimpedance in La0.7Ba0.15Sr0.15MnO3 compound

Das, S; Dhak, D; Reis, MS; Amaral, VS; Dey, TK
2010, MATERIALS CHEMISTRY AND PHYSICS, 120, 2-3, 468-471.

Magnetic study of amorphization of ball-milled FeCr alloys

Loureiro, JM; Costa, BFO; Das, S; Amaral, VS; Le Caer, G
2010, INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009), 200.

The effect of magnetic irreversibility on estimating the magnetocaloric effect from magnetization measurements

Amaral, JS; Amaral, VS
2009, APPLIED PHYSICS LETTERS, 94, 4.

High refrigerant capacity of PrNi5-xCox magnetic compounds exploiting its spin reorientation and magnetic transition over a wide temperature zone

Rocco, DL; Amaral, JS; Leitao, JV; Amaral, VS; Reis, MS; Das, S; Fernandes, RP; Araujo, JP; Pereira, AM; Tavares, PB; Martins, NV; Coelho, AA
2009, JOURNAL OF PHYSICS D-APPLIED PHYSICS, 42, 5.

Superferromagnetism in mechanically alloyed fcc Fe23Cu77 with bimodal cluster size distribution

Silva, NJO; Amaral, JS; Amaral, VS; Costa, BFO; Le Caer, G
2009, JOURNAL OF PHYSICS-CONDENSED MATTER, 21, 4.

Percolation processes and spin-reorientation of PrNi5-xCox

Rocco, DL; Amaral, JS; Leitao, JV; Amaral, VS; Reis, MS; Fernandes, RP; Pereira, AM; Araujo, JP; Martins, NV; Tavares, PB; Coelho, AA
2009, PHYSICAL REVIEW B, 79, 1.

Electro-precipitation of Fe(3)O(4) nanoparticles in ethanol

Marques, RFC; Garcia, C; Lecante, P; Ribeiro, SJL; Noe, L; Silva, NJO; Amaral, VS; Millan, A; Verelst, M
2008, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 320, 19, 2311-2315.

Magnetic and transport studies of sigma-phase Fe50V50 alloys with different thermal history

Costa, BFO; Amaral, VS; Le Caer, G; Braga, ME; Amado, MM; Rocco, DL; Sousa, JB
2008, JOURNAL OF NON-CRYSTALLINE SOLIDS, 354, 47-51, 5287-5289.

Structural characterization of MnNi and MnPt antiferromagnetic materials for spintronic applications

Teixeira, JM; Ventura, J; Araujo, JP; Sousa, JB; Amaral, VS; Negulescu, B; Rickart, M; Freitas, PP
2008, JOURNAL OF NON-CRYSTALLINE SOLIDS, 354, 47-51, 5275-5278.

The effect of chemical distribution on the magnetocaloric effect: A case study in second-order phase transition manganites

Amaral, JS; Tavares, PB; Reis, MS; Araujo, JP; Mendonca, TM; Amaral, VS; Vieira, JM
2008, JOURNAL OF NON-CRYSTALLINE SOLIDS, 354, 47-51, 5301-5303.

Studies of local fields in the Pr1-xCaxMnO3 system using perturbed angular correlation spectroscopy

Lopes, AML; Araujo, JP; Mendonca, TM; Amaral, JS; Pereira, AM; Tavares, PB; Amaral, VS; Correia, JG
2008, JOURNAL OF NON-CRYSTALLINE SOLIDS, 354, 47-51, 5315-5317.

Synthesis, structure and magnetic behaviour of mixed metal leucophosphite

Shi, FN; dos Santos, AM; Cunha-Silva, L; Costa, BFO; Klinowski, J; Paz, FAA; Amaral, VS; Rocha, J; Trindade, T
2008, JOURNAL OF SOLID STATE CHEMISTRY, 181, 6, 1330-1336.

Comment on "Magnetization reversal in europium sulfide nanocrystals" [Appl. Phys. Lett. 89, 222501 (2006)]

Silva, NJO; Amaral, VS
2008, APPLIED PHYSICS LETTERS, 92, 2.

Evidence of random magnetic anisotropy in ferrihydrite nanoparticles based on analysis of statistical distributions

Silva, NJO; Amaral, VS; Carlos, LD; Rodriguez-Gonzalez, B; Liz-Marzan, LM; Berquo, TS; Banerjee, SK; Bermudez, VD; Millan, A; Palacio, F
2008, PHYSICAL REVIEW B, 77, 13.

New phase transition in the Pr(1-x)Ca(x)MnO(3) system: Evidence for electrical polarization in charge ordered manganites

Lopes, AML; Araujo, JP; Amaral, VS; Correia, JG; Tomioka, Y; Tokura, Y
2008, PHYSICAL REVIEW LETTERS, 100, 15.

Influence of the Magnetic Anisotropy on the Magnetic Entropy Change of Ni2Mn(Ga, Bi) Memory Shape Alloy

Leitao, JCV; Rocco, DL; Amaral, JS; Reis, MD; Amaral, VBS; Fernandes, RP; Martins, NV; Tavares, PB
2008, IEEE TRANSACTIONS ON MAGNETICS, 44, 11, 3036-3039.

Phase Separation of La0.70-xErxSr0.30MnO3 and its Effect on Magnetic and Magnetocaloric Properties

Amaral, JS; Reis, MS; Araujo, JP; Mendonaca, TM; Tavares, PB; Amaral, VS; Vieira, JM
2008, ADVANCED MATERIALS FORUM IV, 587-588, 338-+.

Synthesis, characterisation and luminescent properties of lanthanide-organic polymers with picolinic and glutaric acids

Girginova, PI; Paz, FAA; Soares-Santos, PCR; Ferreira, RAS; Carlos, LD; Amaral, VS; Klinowski, J; Nogueira, HIS; Trindade, T
2007, EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 26, 4238-4246.

Nanoscopic photoluminescence memory as a fingerprint of complexity in self-assembled alkyl/siloxane hybrids

Carlos, LD; Bermudez, VD; Amaral, VS; Nunes, SC; Silva, NJO; Ferreira, RAS; Rocha, J; Santilli, CV; Ostrovskii, D
2007, ADVANCED MATERIALS, 19, 3, 341-+.

Processing and phase separation of LSMO-based multiferroic composite ceramics

Song, GB; Amaral, JS; Amaral, VS; Kholkin, AL
2007, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 27, 13-15, 3941-3945.

Surface effects in maghemite nanoparticles

Millan, A; Urtizberea, A; Silva, NJO; Palacio, F; Amaral, VS; Snoeck, E; Serin, V
2007, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 312, 1, L5-L9.

Synthesis, crystal structure and magnetic characterization of Na2CU5(Si2O7)2: An inorganic ferrimagnetic chain

dos Santos, AM; Brandao, P; Fitch, A; Reis, MS; Amaral, VS; Rocha, J
2007, JOURNAL OF SOLID STATE CHEMISTRY, 180, 1, 16-21.

Critical current density improvement in BSCCO superconductors by application of an electric current during laser floating zone growth

Carrasco, MF; Silva, RA; Silva, RF; Amaral, VS; Costa, FM
2007, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 460, 1347-1348.

A mean-field scaling method for first- and second-order phase transition ferromagnets and its application in magnetocaloric studies

Amaral, JS; Silva, NJO; Amaral, VS
2007, APPLIED PHYSICS LETTERS, 91, 17.

Specific heat of clustered low dimensional magnetic systems

Sreis, MS; dos Santos, AM; Amaral, VS; Souza, AM; Brandao, P; Rocha, J; Tristan, N; Klingeler, R; Buchner, B; Volkova, O; Vasiliev, AN
2007, JOURNAL OF PHYSICS-CONDENSED MATTER, 19, 44.

Biofunctionalized ferromagnetic CoPt3/polymer nanocomposites

Martins, MA; Neves, MC; Esteves, ACC; Girginova, PI; Guiomar, AJ; Amaral, VS; Trindade, T
2007, NANOTECHNOLOGY, 18, 21.

Annealing time effect on Bi-2223 phase development in LFZ and EALFZ grown superconducting fibres

Carrasco, MF; Amaral, VS; Silva, RF; Vieira, JM; Costa, FM
2006, APPLIED SURFACE SCIENCE, 252, 14, 4957-4963.

Hydrothermal synthesis, structural characterisation and magnetic behaviour of (4,4 '-bpyH)(2)[M(4,4 '-bpy)(H2O)(4)]-[V2O2(pmida)(2)]center dot 2H(2)O (M=Mn2+ and CO2+)

Shi, FN; Paz, FAA; Girginova, PI; Amaral, VS; Rocha, J; Klinowski, J; Trindade, T
2006, INORGANICA CHIMICA ACTA, 359, 4, 1147-1158.

Mechanically induced phase transformations of the sigma phase of nanograined and of coarse-grained near-equiatomic FeCr alloys

Costa, BFO; Le Caer, G; Loureiro, JM; Amaral, VS
2006, JOURNAL OF ALLOYS AND COMPOUNDS, 424, 1-2, 131-140.

A novel cobalt(II)-molybdenum(V) phosphate organic-inorganic hybrid polymer

Shi, FN; Paz, FAA; Girginova, PI; Nogueira, HIS; Rocha, J; Amaral, VS; Klinowski, J; Trindade, T
2006, JOURNAL OF SOLID STATE CHEMISTRY, 179, 5, 1497-1505.

One-dimensional coordination polymer of N-(phosphonomethyl) iminodiacetic acid with iron(II)

Shi, FN; Paz, FAA; Girginova, P; Rocha, J; Amaral, VS; Klinowski, J; Trindade, T
2006, JOURNAL OF MOLECULAR STRUCTURE, 789, 1-3, 200-208.

Structural and magnetic studies in ferrihydrite nanoparticles formed within organic-inorganic hybrid matrices

Silva, NJO; Amaral, VS; Carlos, LD; Rodriguez-Gonzalez, B; Liz-Marzan, LM; Millan, A; Palacio, F; Bermudez, VDZ
2006, JOURNAL OF APPLIED PHYSICS, 100, 5.

Bi-Sr-Ca-Cu-O superconducting fibres processed by the laser floating zone AMAM technique under dinerent electrical current intensities

Carrasco, MF; Soares, MR; Amaral, VS; Vieira, JM; Silva, RF; Costa, FM
2006, SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 19, 4, 373-380.

Experimental determination of the nonextensive entropic parameter q

Reis, MS; Amaral, VS; Sarthour, RS; Oliveira, IS
2006, PHYSICAL REVIEW B, 73, 9.

Percolative transition on ferromagnetic insulator manganites: Uncorrelated to correlated polaron clusters

Lopes, AML; Araujo, JP; Ramasco, JJ; Amaral, VS; Suryanarayanan, R; Correia, JG
2006, PHYSICAL REVIEW B, 73, 10.

Homometallic ferrimagnetism in the zig-zag chain compound Na2Cu5Si4O14

Reis, MS; dos Santos, AM; Amaral, VS; Brandao, P; Rocha, J
2006, PHYSICAL REVIEW B, 73, 21.

Physical meaning and measurement of the entropic parameter q in an inhomogeneous magnetic systems

Reis, MS; Amaral, VS; Sarthour, RS; Oliveira, IS
2006, EUROPEAN PHYSICAL JOURNAL B, 50, 1-2, 99-103.

Iron oxide and oxide-hydroxide nanoparticles in organic-inorganic matrices

Silva, NJO; Millan, A; Amaral, VS; Palacio, F; Fu, LS; Carlos, LD; Bermudez, VDZ
2006, ADVANCED MATERIALS FORUM III, PTS 1 AND 2, 514-516, 142-146.

Gd-doped LaM nO(3) manganites prepared by the sol-gel technique

Lopes, AML; Araujo, JP; Gomes, AM; Mendonca, TM; Tavares, PB; Correia, JG; Amaral, VS
2006, ADVANCED MATERIALS FORUM III, PTS 1 AND 2, 514-516, 289-293.

The effects of Ca and Mn excess co-doping in CMR manganites solid solution structures

Figueiras, F; Vieira, JM; Guzik, ME; Legendziewicz, J; Tavares, PB; Amaral, VS
2006, ADVANCED MATERIALS FORUM III, PTS 1 AND 2, 514-516, 294-298.

Tuning of magnetocaloric effect in ferromagnetic La-Sr manganites through Er and Eu doping

Amaral, JS; Reis, MS; Amaral, VS; Mendonca, TM; Araujo, JP; Tavares, PB; Vieira, JM
2006, ADVANCED MATERIALS FORUM III, PTS 1 AND 2, 514-516, 299-303.

Preparation and properties of new superconductor material MgB2

Marinha, D; Oliveira, FJ; Reis, MS; Costa, FM; Carrasco, MF; Araujo, JP; Sousa, JB; Vieira, JM; Amaral, VS
2006, ADVANCED MATERIALS FORUM III, PTS 1 AND 2, 514-516, 333-337.

The effect of annealing temperature on the transport properties of BSCCO fibres grown by LFZ and EALFZ

Carrasco, MF; Monteiro, JH; Amaral, VS; Silva, RF; Vieira, JM; Costa, FM
2006, ADVANCED MATERIALS FORUM III, PTS 1 AND 2, 514-516, 338-342.

Synthesis, magnetic and Mossbauer studies of mechanically alloyed Fe0.63Si0.37 a alloys

Costa, BFO; Amaral, VS; Le Caer, G
2006, ADVANCED MATERIALS FORUM III, PTS 1 AND 2, 514-516, 1265-1268.

Local probe studies on oxides using radioactive isotopes

Araujo, JP; Lopes, AML; Rita, E; Correia, JG; Amaral, VS; Wahl, U
2006, ADVANCED MATERIALS FORUM III, PTS 1 AND 2, 514-516, 1593-1597.

Magnetic behavior of iron (III) oxyhydroxy nanoparticles in organic-inorganic hybrid matrices

Silva, NJO; Amaral, VS; Carlos, LD; Fu, LS; Nunes, SC; Bermudez, VD
2005, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 290, 962-965.

Magnetocaloric effect in Er- and Eu-substituted ferromagnetic La-Sr manganites

Amaral, JS; Reis, MS; Amaral, VS; Mendonca, TM; Araujo, JP; Sa, MA; Tavares, PB; Vieira, JM
2005, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 290, 686-689.

Magnetocaloric effect of the (Pr,Ca)MnO3 manganite at low temperatures

Gomes, AM; Garcia, F; Guimaraes, AP; Reis, MS; Amaral, VS; Tavares, PB
2005, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 290, 694-696.

Charge-ordering contribution to the magnetic entropy change of (Pr, Ca)MnO3 manganites

Reis, MS; Gomes, AM; Araujo, JP; Amaral, JS; Tavares, PB; Oliveira, IS; Amaral, VS
2005, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 290, 697-699.

Synthesis, characterisation and magnetic properties of copper(II) complexes with 3-hydroxypicolinic acid (HpicOH): the crystal structure of [Cu(picOH)(2)(BPE)](2)center dot[Cu(picOH)(2)(BPE)(2)]center dot 8H(2)O

Girginova, PI; Paz, FAA; Nogueira, HIS; Silva, NJO; Amaral, VS; Klinowski, J; Trindade, T
2005, JOURNAL OF MOLECULAR STRUCTURE, 737, 2-3, 221-229.

Hydrothermal synthesis, structural characterisation and magnetic behaviour of hybrid complexes of N-(phosphonomethyl)iminodiacetate

Shi, FN; Paz, FAA; Girginova, PI; Mafra, L; Amaral, VS; Rocha, J; Makal, A; Wozniak, K; Klinowski, J; Trindade, T
2005, JOURNAL OF MOLECULAR STRUCTURE, 754, 1-3, 51-60.

Synthesis, characterisation and magnetic properties of cobalt (II) complexes with 3-hydroxypicolinic acid (HpicOH): [Co(picOH)2(H2O)(2)] and mer-[N(CH3)(4)][Co(picOH)(3)] center dot H2O

Girginova, PI; Paz, FAA; Nogueira, HIS; Silva, NJO; Amaral, VS; Klinowski, J; Trindade, T
2005, POLYHEDRON, 24, 4, 563-569.

Matrix assisted formation of ferrihydrite nanoparticles in a siloxane/poly(oxyethylene) nanohybrid

Silva, NJO; Amaral, VS; Bermudez, VD; Nunes, SC; Ostrovskii, D; Rocha, J; Carlos, LD
2005, JOURNAL OF MATERIALS CHEMISTRY, 15, 4, 484-490.

NMR relaxivity of Ln(3+)-based zeolite-type materials

Pereira, GA; Ananias, D; Rocha, J; Amaral, VS; Muller, RN; Elst, LV; Toth, E; Peters, JA; Geraldes, CFGC
2005, JOURNAL OF MATERIALS CHEMISTRY, 15, 35-36, 3832-3837.

Magnetic entropy change of Pr1-xCaxMnO3 manganites (0.2 <= x <= 0.95)

Reis, MS; Amaral, VS; Araujo, JP; Tavares, PB; Gomes, AM; Oliveira, IS
2005, PHYSICAL REVIEW B, 71, 14.

Relevance of magnetic moment distribution and scaling law methods to study the magnetic behavior of antiferromagnetic nanoparticles: Application to ferritin

Silva, NJO; Amaral, VS; Carlos, LD
2005, PHYSICAL REVIEW B, 71, 18.

Singlet ground state determined by isolated Cu2+ chain topology in microporous Na2Cu2Si4O11 center dot 2H(2)O and Na2Cu2Si4O11

dos Santos, AM; Amaral, VS; Brandao, P; Paz, FAA; Rocha, J; Ferreira, LP; Godinho, M; Volkova, O; Vasiliev, A
2005, PHYSICAL REVIEW B, 72, 9.

Atomic ordering of the fluorine dopant in the HgBa2CuO4+delta high-T-c superconductor

Correia, JG; Haas, H; Amaral, VS; Lopes, AML; Araujo, JP; Le Floch, S; Bordet, P; Rita, E; Soares, JC; Troger, W
2005, PHYSICAL REVIEW B, 72, 14.

Comment on "Thermoinduced magnetization in nanoparticles of antiferromagnetic materials"

Silva, NJO; Carlos, LD; Amaral, VS
2005, PHYSICAL REVIEW LETTERS, 94, 3.

Charge-ordering and magnetoelastic coupling effects on the magnetocaloric properties of manganites

Reis, MS; Gomes, AM; Araujo, JP; Tavares, PB; Amaral, JS; Oliveira, IS; Amaral, VS
2004, ACTA PHYSICA POLONICA A, 105, 1-2, 163-171.

Phase and structural study of self-doped La1-x-yCaxOyMnO3+delta

Figueiras, F; Araujo, JP; Amaral, VS; Tavares, PB; Lopes, AB; Vieira, JM
2004, ACTA PHYSICA POLONICA A, 105, 1-2, 173-182.

Electrical field gradient studies on La1-xCdxMnO3+delta system

Araujo, JP; Lopes, AML; Mendonca, TM; Rita, E; Correia, JG; Amaral, VS
2004, HYPERFINE INTERACTIONS, 158, 1-4, 347-351.

Magnetocaloric effect on the Pr0.43Gd0.25Ca0.32MnO3 manganite

Gomes, AM; Reis, MS; Guimaraes, AP; Tavares, PB; Araujo, JP; Amaral, VS
2004, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 272, 2385-2386.

Cadmium doping at Mn site in Pr0.5Ca0.5MnO3

Lopes, AML; Araujo, JP; Gomes, AM; Reis, MS; Amaral, VS; Tavares, PB
2004, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 272, 1767-1768.

Local probe studies on LaMnO3+delta using the angular correlation technique

Lopes, AML; Araujo, JP; Rita, E; Correia, JG; Amaral, VS; Suryanarayanan, R
2004, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 272, E1671-E1673.

Ferrihydrite antiferromagnetic nanoparticles in a sol-gel derived organic-inorganic matrix

Silva, NJO; Amaral, VS; Carlos, LD; Bermudez, VD
2004, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 272, 1549-1550.

Structural and magnetic study of self-doped La1-x-yCaxOyMnO3

Figueiras, F; Araujo, JP; Amaral, VS; Tavares, PB; Sousa, JB; Vieira, JM
2004, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 272, 1753-1755.

Positive and 'colossal' magnetocaloric effect due to charge ordering in CMR manganites

Reis, MS; Gomes, AM; Araujo, JP; Tavares, PB; Oliveira, IS; Amaral, VS
2004, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 272, 2393-2394.

Magnetic nonextensivity in CMR manganites

Reis, MS; Araujo, JP; Amaral, VS; Oliveira, IS
2004, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 272, 1011-1012.

Magnetoelastic coupling influence on the magnetocaloric effect in ferromagnetic materials

Amaral, VS; Amaral, JS
2004, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 272, 2104-2105.

Perturbed angular correlation study of Pr(1-x)Ca(x)Mno(3)

Lopes, AML; Araujo, JP; Rita, E; Correia, JG; Amaral, VS; Tomioka, Y; Tokura, Y; Suryanarayanan, R
2004, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 272, E1667-E1668.

Effect of presence of an acid catalyst on structure and properties of iron-doped siloxane-polyoxyethylene nanocomposites prepared by sol-gel

Chiavacci, LA; Dahmouche, K; Silva, NJO; Carlos, LD; Amaral, VS; Bermudez, VD; Pulcinelli, SH; Santilli, CV; Briois, V; Craievich, AF
2004, JOURNAL OF NON-CRYSTALLINE SOLIDS, 345, 585-590.

First stoichiometric large-pore chromium(III) silicate catalyst

Brandao, P; Valente, A; Ferreira, A; Amaral, VS; Rocha, J
2004, MICROPOROUS AND MESOPOROUS MATERIALS, 69, 3, 209-215.

Ion beam studies of single crystalline manganite thin films

Alves, E; Marques, C; Amaral, VS; Araujo, JP; Cristiani, G; Habermeier, HU; Vieira, JM
2004, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 219, 933-937.

Field-tuned magnetocaloric effect in metamagnetic manganite system

Gomes, AM; Garcia, F; Guimaraes, AP; Reis, MS; Amaral, VS
2004, APPLIED PHYSICS LETTERS, 85, 21, 4974-4976.

Magnetocaloric effect in manganites: Ferromagnetism and charge-ordering effects

Reis, MS; Gomes, AM; Araujo, JP; Tavares, PB; Amaral, JS; Oliveira, IS; Amaral, VS
2004, ADVANCED MATERIALS FORUM II, 455-456, 148-152.
ISBN: 0-87849-941-5

Nanosized photonics and magnetism in organic-inorganic hybrids

Carlos, LD; Ferreira, RAS; Silva, NJO; Amaral, VS; Goncalves, MC; Bermudez, VD
2004, ADVANCED MATERIALS FORUM II, 455-456, 564-568.
ISBN: 0-87849-941-5

Magnetic properties of Fe-doped organic-inorganic nanohybrids

Silva, NJO; Amaral, VS; Carlos, LD; Bermudez, VD
2003, JOURNAL OF APPLIED PHYSICS, 93, 10, 6978-6980.

Tricritical points in La-based ferromagnetic manganites

Amaral, VS; Araujo, JP; Pogorelov, YG; Sousa, JB; Tavares, PB; Vieira, JM; Algarabel, PA; Ibarra, MR
2003, JOURNAL OF APPLIED PHYSICS, 93, 10, 7646-7648.

Magnetic phase diagram for a nonextensive system: Experimental connection with manganites

Reis, MS; Amaral, VS; Araujo, JP; Oliveira, IS
2003, PHYSICAL REVIEW B, 68, 1.

Magnetic behavior of a nonextensive S-spin system: Possible connections to manganites

Reis, MS; Araujo, JP; Amaral, VS; Lenzi, EK; Oliveira, IS
2002, PHYSICAL REVIEW B, 66, 13.

The Mean-Field Theory in the Study of Ferromagnets and the Magnetocaloric Effect

In Juan Carlos Moreno-Piraján (Eds.), Thermodynamics - Systems in Equilibrium and Non-Equilibrium
Amaral J S , Das S ,Amaral V S
2011, Rijeka, InTech.
ISBN: 978-953-307-283-8

Materiais com Magnetoresistência Colossal

In Amaral Fortes M, Ferreira P J (Eds.), Materiais Dois Mil
Amaral V S
2003, 249-257, Ist Press.
ISBN: 9789728469238

Patentes

Termómetro molecular luminiscente que comprende una matriz orgánica/inorgánica com complejos tris (?-dicetonato) de lantánidos)

Devices Internacional

Palacio, Fernando; Escolano, Angel; Silva, Nuno; Carlos, Luis ; Amaral, Vitor; Lima, Patricia; Brites, Carlos

Matriz orgânica/inorgânica luminescente que contém complexos tris(beta-dicetonatos) de catiões de dois lantanídeos diferentes (európio e térbio). Opcionalmente, a matriz compreende nanopartículas magnéticas de óxido de ferro reves...

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