Magnetic properties and large cryogenic low-field magnetocaloric effect of HoCo2 nanoparticles without core/shell structure

doi:10.1007/s11051-009-9717-8

IMR OpenIR

	Magnetic properties and large cryogenic low-field magnetocaloric effect of HoCo2 nanoparticles without core/shell structure
	Liu, X. G.1,2; Geng, D. Y.1,2; Jiang, J. J.1,2; Li, B.1,2; Ma, S.1,2; Li, D.1,2; Liu, W.1,2; Zhang, Z. D.1,2
通讯作者	Liu, X. G.(liuxg@imr.ac.cn)
	2010-05-01
发表期刊	JOURNAL OF NANOPARTICLE RESEARCH
ISSN	1388-0764
卷号	12 期号:4 页码:1167-1172
摘要	The HoCo2 nanoparticles are found to be stable in air without any shell protection. The HoCo2 nanoparticles display superparamagnetic properties between their blocking temperature of 40 K and Curie temperature of 78 K. The magnetic-entropy change increases with decreasing temperature at a certain magnetic-field change, which is ascribed to the competition between the Zeeman energy and thermal-agitation energy at low temperatures. A large magnetic-entropy change of 19.4 J kg(-1) K-1 was found at 7.5 K in an applied-field change from 1 to 7 T, while 6.1 J kg(-1) K-1 was achieved in a low field change of 1 T. HoCo2 nanoparticles are useful for application of magnetic refrigeration at low temperatures.
关键词	Nanoparticles Magnetic properties Magnetocaloric effect Environment-friendly refrigeration
资助者	National Natural Science Foundation of China
DOI	10.1007/s11051-009-9717-8
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[5033 1030] ; National Natural Science Foundation of China[50831006]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000276883600010
出版者	SPRINGER
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/100673
专题	中国科学院金属研究所
通讯作者	Liu, X. G.
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu, X. G.,Geng, D. Y.,Jiang, J. J.,et al. Magnetic properties and large cryogenic low-field magnetocaloric effect of HoCo2 nanoparticles without core/shell structure[J]. JOURNAL OF NANOPARTICLE RESEARCH,2010,12(4):1167-1172.
APA	Liu, X. G..,Geng, D. Y..,Jiang, J. J..,Li, B..,Ma, S..,...&Zhang, Z. D..(2010).Magnetic properties and large cryogenic low-field magnetocaloric effect of HoCo2 nanoparticles without core/shell structure.JOURNAL OF NANOPARTICLE RESEARCH,12(4),1167-1172.
MLA	Liu, X. G.,et al."Magnetic properties and large cryogenic low-field magnetocaloric effect of HoCo2 nanoparticles without core/shell structure".JOURNAL OF NANOPARTICLE RESEARCH 12.4(2010):1167-1172.