Effects of B′-site transition metal on the properties of double perovskites Sr2FeMO6 (M = Mo, W): B′ 4d-5d system
Journal
Solid State Communications
Journal Volume
133
Journal Issue
4
Pages
265-270
Date Issued
2005
Author(s)
Abstract
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. © 2004 Elsevier Ltd. All rights reserved.
Subjects
A. Magnetically ordered materials; D. Magnetoresistance; E. X-ray spectroscopies
Other Subjects
Crystal structure; Magnetization; Magnetoresistance; Oxygen; Perovskite; Transition metals; X ray spectroscopy; Magnetically ordered materials; Magnetotransport properties; Rare-earth ions; Strontium compounds
Type
journal article