The crystal structure, magnetic and magnetotransport properties of the variation of B′-site transition metal in S2FeMO6 (M=Mo, W) with double perovskites structure have been investigated systematically. Measurements of magnetization vs. temperature at H=5T show that Sr2FeMoO6 is a ferromagnet and Sr2FeWO 6 is an antiferromagnet with TN∼35 K. Additionally, the large magnetoresistance ratio (MR) of ∼22% (H=3 T) at room temperature (RT) was observed in the Sr2FeWO6 compound. However, the Sr2FeMoO6 compound did not show any significant MR even at high fields and RT (MR∼ 1%; H=3 T and 300 K). The implications of these findings are supported by band structure calculations to explain the interaction between the 4d(Mo) and 5d(W) orbitals of transition metal ions and oxygen ions.
|頁（從 - 到）||265-270|
|期刊||Solid State Communications|
|出版狀態||已發佈 - 2005 1月|
ASJC Scopus subject areas
- 化學 (全部)