The magnetic entropy change in CoMnSb alloys with different crystal sizes

被引：5
|
作者：
Li, Shandong [1 ,2 ,3 ]
机构：
[1] Fujian Normal Univ, Dept Phys, Fuzhou 350007, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[3] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 448卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
nanostructured materials; magnetocaloric; transition metals alloys and compounds;
D O I：
10.1016/j.jallcom.2007.03.052
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：
The magrictocalorie effect (MCE) in CoMnSb has been investigated by comparing two samples with different crystal size. One sample is the ingot with crystal size of 120 nm, referred as sample A. The other with average crystal size of 30 mn has been fabricated by rapid solidification method, referred as sample B. It has been found that crystal size dramatically affects the magnetic properties and NICE for CoMnSb alloy. For example, in comparison with sample A, sample B exhibits a lower magnetization and Curie temperature, but an enhanced refrigerant capacity and broader working temperature range. These facts indicate that sample B is superior to the ingot in practical application. The above results are explained in terms of the effect of crystal size and atomic disorder on the intrinsic magnetic properties and magnetic entropy change. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：73 / 76
页数：4
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