Crystal structure and magnetic properties of Mo-substituted 'Ba2(Fe,W)2O6' double-perovskites:: a synchrotron diffraction, magnetization and Mossbauer study

被引：14

作者：

Rammeh, N

Bramnik, KG

Ehrenberg, H

Stahl, B

Fuess, H

Cheikh-Rouhou, A

机构：

[1] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany

[2] Fac Sci, Phys Mat Lab, Sfax 3018, Tunisia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2004年 / 363卷 / 1-2期

关键词：

transition metal compounds; oxide materials; crystal structure; synchrotron radiation; magnetic measurements;

D O I：

10.1016/S0925-8388(03)00464-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Synchrotron diffraction and Mossbauer spectroscopy on Ba-2(Fe,W)(2)O-6 confirmed an Fe excess in this double-perovskite, better described as Ba2Fe(FexW1-x)O6-delta with x = 0.2. The crystal structure is cubic (Fm (3) over barm) down to 10 K, and a recently reported tetragonal structure of Ba2FeWO6 is critically reviewed. Magnetic properties of Ba-2(Fe,W1-xMox)(2)O-6 compounds were studied by SQUID measurements and revealed weak ferromagnetism at low temperatures, and T-C increases with more substitution of Mo for W. (C) 2003 Elsevier B.V. All rights reserved.

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页码：24 / 31

页数：8

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