| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10636754 | Solid State Sciences | 2005 | 8 Pages |
Abstract
A series of Sr2Fe1âxMgxMoO6(0⩽x⩽1) double perovskite oxides have been prepared and their crystal, magnetic and transport properties studied. Rietveld refinements, in tetragonal space group I4/m, show an almost complete B-cation ordering in the doped samples. A systematic decrease in Curie temperature, TC and saturation magnetization, MS with increase of x has been observed in this solid solution series. Resistivities show a semiconducting behavior for all samples and increase with x. The x=0 sample becomes metallic above a metal-insulator transition temperature of 45 K in applied fields of 30 and 50 kOe. Negative colossal magnetoresistances (CMR) have been observed (up to 47% for the x=0.6 sample at 5 K) in all the samples and these MR effects show a strong dependence on the microstructural nature (grain boundaries) of the material.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Falak Sher, A. Venimadhav, M.G. Blamire, B. Dabrowski, S. Kolesnik, J. Paul Attfield,