Phase structure and magnetocaloric effect of (Tb1–xDyx)Co2 alloys

被引：0
作者：
庄应烘 [1 ]
陈湘 [1 ,2 ]
周开文 [1 ]
李克峰 [1 ]
马春华 [1 ]
机构：
[1] Key Laboratory of Nonferrous Metal Materials and New Processing Technology, Guangxi University  2. Physics and Electronic Information Engineering Department, Neijiang Teachers College
来源：
Journal of Rare Earths | 2008年 / 05期
关键词：
magnetic refrigeration materials; magnetocaloric effect; magnetic phase transition; (Tb1–xDyx)Co2 alloys; rare earths;
D O I：
暂无
中图分类号：
TG146.45 [];
学科分类号：
080502 ;
摘要：
Phase structure and magnetocaloric effect of (Tb1–xDyx)Co2 alloys with x=0, 0.2, 0.4, 0.6, 0.8, and 1.0 were investigated using X-ray diffraction analysis, differential thermal analysis, and magnetization measurement. The samples were single phase with cubic MgCu2- type structure; with the increase of Dy content, TC decreased from 240 K (TbCo2) to 130 K (DyCo2), and the maximum magnetic entropy change |?SM,max| increased from 3.133 to 8.176 J/kg·K under low magnetic field of 0–2 T. The Arrott plot and the change of |?SM,max| showed that magnetic phase transition from second order to first order occured with the increase of Dy content between x=0.6 and 0.8.
引用
收藏
页码：749 / 752
页数：4
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