Magnetic properties and magnetocaloric effects in amorphous and crystalline GdCuAl ribbons

被引：29
作者：
Dong, Q. Y. [1 ]
Shen, B. G. [1 ]
Chen, J. [1 ]
Shen, J. [1 ]
Wang, F. [1 ]
Zhang, H. W. [1 ]
Sun, J. R. [1 ]
机构：
[1] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2009年 / 149卷 / 9-10期
基金：
中国国家自然科学基金;
关键词：
ZrNiAl-type; Magnetic entropy change; Nonlinear susceptibility; ENTROPY CHANGE; GD; TRANSITION; DY;
D O I：
10.1016/j.ssc.2008.12.006
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The magnetic properties and magnetocaloric effects of amorphous and crystalline GdCuAl ribbons have been experimentally studied. The amorphous ribbon exhibits a superparamagnetic behaviour, as demonstrated by the appearance of a maximum in the in-phase linear susceptibility chi(1)' and a minimum in the in-phase nonlinear susceptibility chi(3)' at similar to 25 K. In the high temperature range, chi(1)' and chi(3)' vary following the Curie-Weiss law and the 1/T-3-law, respectively. For crystalline GdCuAl; ribbons, a ferromagnetic-to-paramagnetic second-order phase transition takes place around 81 K. The maximum magnetic entropy change and refrigerant capacity are as high as similar to 10.1 J kg(-1) K-1 and 460 J kg(-1), respectively, for a field change of 0-5 T. These features make crystalline GdCuAl an attractive candidate for a low-temperature magnetic refrigerant. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：417 / 420
页数：4
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