Preparation, crystal structure, and magnetic properties of double perovskites M2MgReO6 (M = Ca, Sr, Ba)

被引：31
|
作者：
Bramnik, KG [1 ]
Ehrenberg, H [1 ]
Dehn, JK [1 ]
Fuess, H [1 ]
机构：
[1] Tech Univ Darmstadt, Inst Sci Mat, D-64287 Darmstadt, Germany
来源：
SOLID STATE SCIENCES | 2003年 / 5卷 / 01期
关键词：
alkali-earth rhenates; crystal structure; rietveld refinement; perovskite distortion; magnetic properties; ferromagnetic ordering;
D O I：
10.1016/S1293-2558(02)00097-3
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The complex oxides M2MgReO6 (M = Ca, Sr, Ba) have been synthesized, and their crystal structures were determined by X-ray diffraction powder data analysis. These-compounds belong to the A(2)BB'O-6 (M2MgReO6) perovskites with a "rock-salt" type distribution of Re and Mg atoms over the B-cation sublattice, since a big M cation is located in A positions. The magnetic properties of the M2MgReO6 compounds (M = Ca, Sr, Ba) were investigated and an unexpected behavior observed: significant hysteresis effects were detected for all M2MgReO6 oxides at temperatures up to 300 K. These results point at a ferromagnetic component in all of the M2MgReO6 magnetic structures, even at room temperature. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
引用
收藏
页码：235 / 241
页数：7
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