Reversible magnetocaloric effect and refrigeration capacity enhanced by two successive magnetic transitions in DyB2

被引：17
|
作者：
Meng Hui [1 ]
Li Bing
Han Zheng
Zhang YuQin
Wang XianWei
Zhang ZhiDong
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
来源：
SCIENCE CHINA-TECHNOLOGICAL SCIENCES | 2012年 / 55卷 / 02期
基金：
中国国家自然科学基金;
关键词：
DyB2; magnetocaloric effect; refrigeration capacity; ENTROPY;
D O I：
10.1007/s11431-011-4684-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A large and reversible magnetocaloric effect is found in the compound DyB2, which is associated with two successive magnetic transitions: a spin-reorientation-like transition followed by a ferromagnetic-paramagnetic transition. These two transitions appreciably enlarge the magnetic-refrigeration temperature window and yield a huge refrigeration capacity of 610 J kg(-1), with a maximum magnetic entropy change -Delta S-max of 17 J kg(-1)K(-1), at a magnetic-field change of 5 T. The corresponding values for low magnetic-field change of 2 T are 193 J kg(-1) and 7.4 J kg(-1)K(-1), respectively.
引用
收藏
页码：501 / 504
页数：4
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