abstract
The LaMnO3.08 manganite system was studied as a function of temperature ranging from 10 up to 292K using the perturbed angular correlation local probe technique at ISOLDE-CERN facility. The electrical field gradient (EFG) measurements performed across the different temperatures revealed a single EFG distribution, corresponding to a unique probe local environment. In contrast with the small-polaron picture, no fully Jahn-Teller distorted Mn3+O6 octahedra was observed in this insulator sample. A local single-phase scenario with uniform Mn charge distribution is proposed. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
keywords
OXYGEN-CONTENT; LAMNO3+DELTA; PEROVSKITE; LA1-XCAXMNO3; LOCALIZATION; LA1-XSRXMNO3; DIFFRACTION; CATALYSTS; ORDER; NMR
subject category
Physics
authors
Lopes, AML; Correia, JG; Amaral, VS; Araujo, JP
our authors
Vitor Brás Sequeira Amaral
Full professorProjects
MULTIFOX: Nanometric Probing and Modification of Multiferroic Oxides (PTDC/FIS/105416/2008)
Perturbed Angular Correlations and Electron Channeling Experiments at ISOLDE - applied materials research with nuclear techniques, training and development (CERN/FP/123585/2011)
acknowledgements
This work was supported by FCT-Portugal with projects PTDC/FIS/105416/2008, and CERN/FP/123585/2011; the ISOLDE collaboration with approved project IS487, the European Union FP7-through ENSAR, Contract No. 262010, and the BMBF German research program under contracts 05KK7TS2 and 05K10TS2.