Influence of hydrogenation on the structural and magnetic properties of compounds based on cerium and crystallizing in the tetragonal CeFeSi-type structure

被引：31

作者：

Chevalier, B

Pasturel, M

Bobet, JL

Isnard, O

机构：

[1] Univ Bordeaux 1, UPR 9048, CNRS, Inst Chim Mat Condensee Bordeaux, F-33608 Pessac, France

[2] Univ Grenoble 1, CNRS, UPR 5031, Lab Cristallog, F-38042 Grenoble, France

来源：

SOLID STATE COMMUNICATIONS | 2005年 / 134卷 / 08期

关键词：

magnetically ordered materials; valence fluctuations;

D O I：

10.1016/j.ssc.2005.02.040

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The hydrogen absorption properties of CeMnGe, CeFeSi and CeCoX (X=Si and Ge) have been investigated. Neutron powder diffraction performed on deuteride CeCoGeD indicates that D-atoms are inserted in the pseudo-tetrahedral interstices [Ce-4] of the tetragonal CeFeSi-type structure of this compound. Magnetization and electrical resistivity measurements reveal that the hydrogenation of: (i) CeCoSi and CeCoGe leads to the transition antiferromagnet -> spin fluctuation behaviour; (ii) CeMnGe suppress the magnetic ordering of the Ce-moments. These results which suggest a lost of ordered magnetic moment on the Ce site after hydrogenation could result from the chemical effect of hydrogen which prevails over the unit cell expansion effect. (c) 2005 Elsevier Ltd. All rights reserved.

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页码：529 / 533

页数：5

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