Magnetic properties and magnetocaloric effect in the RCu2Si2 and RCu2Ge2 (R = Ho, Er) compounds

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	Magnetic properties and magnetocaloric effect in the RCu2Si2 and RCu2Ge2 (R = Ho, Er) compounds
	Mo, ZJ ; Shen, J ; Yan, LQ ; Gao, XQ ; Wang, LC ; Tang, CC ; Wu, JF ; Sun, JR ; Shen, BG
刊名	JOURNAL OF APPLIED PHYSICS
	2014
卷号	115 期号:7
ISSN号	0021-8979
通讯作者	Shen, J (reprint author), Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin, Peoples R China.
中文摘要	The magnetic properties and magnetocaloric effect (MCE) in RCu2Si2 and RCu2Ge2 (R = Ho, Er) compounds have been investigated. All these compounds possess an antiferromagnetic (AFM)-paramagnetic (PM) transition around their respective Neel temperatures. The RCu2Si2 compounds undergo spin-glassy behavior above Neel temperature. Furthermore, a field-induced metamagnetic transition from AFM to ferromagnetic (FM) states is observed in these compounds. The calculated magnetic entropy changes show that all RCu2Si2 and RCu2Ge2 (R = Ho, Er) compounds, especially, ErCu2Si2 exhibits large MCEs with no thermal hysteresis and magnetic hysteresis loss. The value of -Delta S-M(max) reaches 22.8 J/Kg K for magnetic field changes from 0 to 5 T. In particular, for field changes of 1 and 2 T, the giant reversible magnetic entropy changes -Delta S-M(max) are 8.3 and 15.8 J/kg K at 2.5 K, which is lower than the boiling point of helium. The low-field giant magnetic entropy change, together with ignorable thermal hysteresis and field hysteresis loss of ErCu2Si2 compound is expected to have effective applications in low temperature magnetic refrigeration. (C) 2014 AIP Publishing LLC.
资助信息	National Natural Science Foundation of China [11104337, 51271192, 11274357, 51322605]; Knowledge Innovation Project of the Chinese Academy of Sciences
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59172]
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	Mo, ZJ,Shen, J,Yan, LQ,et al. Magnetic properties and magnetocaloric effect in the RCu2Si2 and RCu2Ge2 (R = Ho, Er) compounds[J]. JOURNAL OF APPLIED PHYSICS,2014,115(7).
APA	Mo, ZJ.,Shen, J.,Yan, LQ.,Gao, XQ.,Wang, LC.,...&Shen, BG.(2014).Magnetic properties and magnetocaloric effect in the RCu2Si2 and RCu2Ge2 (R = Ho, Er) compounds.JOURNAL OF APPLIED PHYSICS,115(7).
MLA	Mo, ZJ,et al."Magnetic properties and magnetocaloric effect in the RCu2Si2 and RCu2Ge2 (R = Ho, Er) compounds".JOURNAL OF APPLIED PHYSICS 115.7(2014).