Tunable magnetocaloric effect around hydrogen liquefaction temperature in Tb1-xYxCoC2 compounds

被引：1
|
作者：
Xie, Z. G. [1 ]
Li, B.
Li, J.
Geng, D. Y.
Zhang, Z. D.
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2010年 / 405卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Curie temperature; Magnetocaloric effect; Magnetic properties; AC SUSCEPTIBILITY;
D O I：
10.1016/j.physb.2010.01.120
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 effect of Tb1-xYxCoC2 (x = 0, 0.1, 0.2, 0.3, 0.4) compounds have been investigated systematically. All the compounds undergo second-order transitions from paramagnetic to ferromagnetic states without thermal and magnetic hysteresis. With increasing Y content from 0 to 0.4, the Curie temperatures decrease nearly linearly from 28 to 18 K. The nature of the second-order phase transitions can be confirmed by Arrott plots. For Tb0.6Y0.4CoC2 compound, the maximum value of the magnetic entropy change -Delta S-M at 20 K is 9.35 J kg(-1) K-1 for an external field change of 5T (5.14 J kg(-1) K-1 for 2T). The large reversible magnetic entropy change makes Tb0.6Y04CoC2 compound an attractive candidate for the application at hydrogen liquefaction temperature. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：2133 / 2136
页数：4
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