The magnetic effects in Sr2FeMoO6 perovskite type compound obtained by soft chemistry

Recently, a double perovskite oxide, Sr 2 FeMoO 6 , has been reported to show a very sharp magnetoresistance (MR) response at relatively small-applied fields and at high temperatures. The half-metallic state of this compound ensures a theoretical magnetic moment of 4 μ B per formula unit. Ordering control is expected to be influenced by the synthesis route. In this regard, in this article, perovskite samples were obtained from the liquid phase, using oxalic acid as complexing agent. Application of a field above 0.08 T increases the zero-field-cooled (ZFC) magnetization. Below this field, for the ZFC-curves measured from 2 K up to 400 K, magnetization increases, reaching a peak at T ZFC cups , before decreasing gradually to a paramagnetic state. Saturation moment is relatively low (2.1-2.2 μ B ), probably due to anti-site defects, as suggested in the literature.