Degree of phase transformations in the conditions of polythermal synthesis of SrBaFeMoO6-delta

resumo

The sequence of phase transformations during the crystallization of SrBaFeMoO6-delta by the solid-phase technique from a stoichiometric mixture of simple oxides SrCO3 + BaCO3 + 0.5Fe(2)O(3) + MoO3 was studied. It has been established that the synthesis of barium - strontium ferromolybdate proceeds through a series of sequential - parallel stages. It was found that to minimize the effect of intermediate reaction products, it is necessary to use combined synthesis modes. As a result of using combined synthesis modes for annealing for 20 h and T = 1443 K in vacuum of 10(-5) Torr at the pressure of residual oxygen gas 10(-8) Pa, it was possible to obtain a single-phase barium - strontium ferromolybdate compound with superstructural ordering of iron and molybdenum cations.

palavras-chave

ELECTRICAL-PROPERTIES; MAGNETIC-PROPERTIES; PEROVSKITE; MAGNETORESISTANCE; TEMPERATURE

categoria

Materials Science; Physics

autores

Kalanda, N; Yarmolich, M; Kutuzau, M; Gurskii, A; Soares, MDT; Andrulevicius, M; Abakeviciene, B; Tamulevicius, S

nossos autores

Grupos

agradecimentos

The authors acknowledge the support of the work in frames of the European project H2020-MSCA-RISE-2017-778308 - SPINMULTIFILM.

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