Abstract
Double perovskite Sr2FeMoO6 was successfully synthesized by a solid state reaction technique. The ordering parameter of Fe and Mo ions on the B site of the perovskite structure was estimated to be 62% by Rietveld analysis. Saturation magnetization at 5 K was 1.9 μB per formula unit, which is about half the theoretically predicted value. The Mossbauer spectrum at 20 K can be fitted by the two magnetic sextets that correspond to valence-fluctuated Fe2.5+ and Fe3+. The reduced magnetization and the valences of Fe ions can be understood by considering the partially ordered atomic arrangement of Fe and Mo on the B site.
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