Sequence of phase transformations and inhomogeneous magnetic state in nanosized Sr2FeMoO6-delta
authors Yarmolich, MV; Kalanda, NA; Yaremchenko, AA; Gavrilov, SA; Dronov, AA; Silibin, MV
nationality International
journal INORGANIC MATERIALS
author keywords double perovskite; nanoscale; single-phase state; phase transformations; magnetization; super-paramagnetism
keywords DOUBLE-PEROVSKITE SR2FEMOO6; OXYGEN STOICHIOMETRY; GEL
abstract We have studied the effect of synthesis conditions on the phase composition, grain size and morphology, degree of superstructural ordering, and magnetic properties of the Sr2FeMoO6-delta double perovskite. The results demonstrate that its magnetic state, dependent on the nonuniformity of grain morphology and the degree of superstructural ordering of the iron and molybdenum cations, correlates with the initial solution pH. Analysis of the sequence of phase transformations during strontium ferromolybdate crystallization in the citrate gel process from a pH 4 starting solution allowed us to propose combined conditions that ensure the preparation of single-phase Sr2FeMoO6-delta powder with an average grain size in the range 50-120 nm and the highest degree of superstructural ordering of the iron and molybdenum cations: P = 88%.
publisher MAIK NAUKA/INTERPERIODICA/SPRINGER
issn 0020-1685
isbn 1608-3172
year published 2017
volume 53
issue 1
beginning page 96
ending page 102
digital object identifier (doi) 10.1134/S0020168517010186
web of science category Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000395059400015
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journal impact factor 0.699
5 year journal impact factor 0.661
category normalized journal impact factor percentile 13.860
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