Cation order and magnetic properties of double perovskite Sr2FeMoO6

Abstract

A double perovskite type compound Sr2FeMoO6 was synthesized by a solid-state reaction. The order parameter (x) of Fe and Pt ions on the B sites increased from 68% to 82% and the spontaneous magnetization at 5 K increased from 2.1 to 3.0 μB per formula unit by lowering the calcination temperature from 1100 to 500 °C. The dependence of the spontaneous magnetization on x was discussed using two models considering the local magnetic interactions between ions on the B sites. Fe57 Mössbauer analysis suggested the existence of tiny areas of SrFeO3−δ in Sr2FeMoO6.