The new ternary silicides RE6Co1.67Si3 (RE= Ce, Nd, Gd, Tb, Dy) investigated by X-ray diffraction and magnetization measurements

被引：27

作者：

Chevalier, B.

Gaudin, E.

Weill, F.

机构：

[1] CNRS, ICMCB, F-33608 Pessac, France

[2] Univ Bordeaux 1, ENSCPB, F-33608 Pessac, France

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 442卷 / 1-2期

关键词：

rare earth alloys and compounds; magnetization; X-ray diffraction;

D O I：

10.1016/j.jallcom.2006.06.111

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：

These compounds crystallize in the hexagonal structure (space group P6(3)/m) related to the Gd6Co1.67 Si-3-type. The magnetization measurements reveal that: (i) the cerium exhibits a trivalent state in Ce6Co1.67Si3 but no magnetic ordering is evidenced above 1.8K; (ii) on the contrary, two ferro(ferri)magnetic transitions are detected for Nd6Co1.67Si3 (84 and 35 K) and Tb6Co1.67Si3 (183 and 39 K); in both case, a remanence phenomena appears for temperatures below the higher magnetic transition; (iii) similar behavior does not exist for Gd6Co1.67 which shows only one ferromagnetic transition below T-C = 294 K. The occurrence of a complex magnetic phase diagram for Nd6Co1.67Si3 and Tb6Co1.67Si3 can be correlated to the existence of two crystallographic sites for rare earth atoms in this new family of compounds. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：149 / 151

页数：3

共 10 条

[1] INTERACTIONS INDIRECTES ENTRE COUCHES 4F DANS LES METAUX DE TERRES RARES [J].