Large magnetocaloric effect in metamagnetic HoPdAl

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	Large magnetocaloric effect in metamagnetic HoPdAl
	Xu, ZY ; Shen, BG
刊名	SCIENCE CHINA-TECHNOLOGICAL SCIENCES
	2012
卷号	55 期号:2 页码:445
关键词	ISOSTRUCTURAL PHASE-TRANSITION MAGNETIC ENTROPY CHANGE GDPDAL SINGLE-CRYSTALS REFRIGERATION COMPOUND
ISSN号	1674-7321
通讯作者	Shen, BG: Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China.
中文摘要	Magnetic properties and magnetocaloric effects (MCEs) of the HoPdAl compounds with the hexagonal ZrNiAl-type and the orthorhombic TiNiSi-type structures are investigated. Both the compounds are found to be antiferromagnet with the N,el temperature T (N) =12 and 10 K, respectively. A field-induced metamagnetic transition from antiferromagnetic (AFM) state to ferromagnetic (FM) state is observed below T (N) . For the hexagonal HoPdAl, a small magnetic field can induce an FM-like state due to a weak AFM coupling, which leads to a high saturation magnetization and gives rise to a large MCE around T (N) . The maximal value of magnetic entropy change (Delta S (M) ) is -20.6 J/kg K with a refrigerant capacity (RC) value of 386 J/kg for a field change of 0-5 T. For the orthorhombic HoPdAl, the critical field required for metamagnetic transition is estimated to be about 1.5 T, showing a strong AFM coupling. However, the maximal Delta S (M) value is still -13.7 J/kg K around T (N) for a field change of 0-5 T. The large reversible Delta S (M) and considerable RC suggest that HoPdAl may be an appropriate candidate for magnetic refrigerant in a low temperature range.
收录类别	SCI
资助信息	National Natural Science Foundation of China [50731007, 51021061]; Chinese Academy of Sciences; High-Technology Research and Development Program of China
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/40609]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Xu, ZY,Shen, BG. Large magnetocaloric effect in metamagnetic HoPdAl[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2012,55(2):445.
APA	Xu, ZY,&Shen, BG.(2012).Large magnetocaloric effect in metamagnetic HoPdAl.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,55(2),445.
MLA	Xu, ZY,et al."Large magnetocaloric effect in metamagnetic HoPdAl".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 55.2(2012):445.