Formation and large cryogenic magnetocaloric effect of HoAl2/Al2O3 nanocapsules

doi:10.1088/0022-3727/42/4/045008

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	Formation and large cryogenic magnetocaloric effect of HoAl2/Al2O3 nanocapsules
	Liu, X. G.1; Li, B.; Geng, D. Y.; Shi, C. X.; Yang, F.; Kang, D. J.; Zhang, Z. D.
通讯作者	Liu, X. G.(liuxg@imr.ac.cn)
	2009-02-21
发表期刊	JOURNAL OF PHYSICS D-APPLIED PHYSICS
ISSN	0022-3727
卷号	42 期号:4 页码:5
摘要	HoAl2/Al2O3 nanocapsules with a core of HoAl2 and a shell of amorphous Al2O3 have been synthesized. The formation of the rare-earth compound nanocapsules can be ascribed to the different melting points and the optimal proportions of Ho and Al atoms during the arc-discharging process. Furthermore, the formation of the Al2O3 shell protects the rare-earth atoms from serious oxidation. The HoAl2/Al2O3 nanocapsules display superparamagnetic properties between the blocking temperature of 6 K and the Curie temperature of 26 K. The absolute value of the magnetic-entropy change in the HoAl2/Al2O3 nanocapsules rapidly increases with the decrease in temperature and reaches 14.7 J kg(-1) K-1 at 3K for a magnetic-field change from 0 to 70 kOe. As a result, this new type of nanocapsule may be applied, in the temperature range studied, in cryogenic magnetic-refrigerator devices.
资助者	National Natural Science Foundation of China
DOI	10.1088/0022-3727/42/4/045008
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[50331030] ; National Natural Science Foundation of China[50831006]
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:000263029400013
出版者	IOP PUBLISHING LTD
引用统计	被引频次：11[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/321006/98421
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.,Li, B.,Geng, D. Y.,et al. Formation and large cryogenic magnetocaloric effect of HoAl2/Al2O3 nanocapsules[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2009,42(4):5.
APA	Liu, X. G..,Li, B..,Geng, D. Y..,Shi, C. X..,Yang, F..,...&Zhang, Z. D..(2009).Formation and large cryogenic magnetocaloric effect of HoAl2/Al2O3 nanocapsules.JOURNAL OF PHYSICS D-APPLIED PHYSICS,42(4),5.
MLA	Liu, X. G.,et al."Formation and large cryogenic magnetocaloric effect of HoAl2/Al2O3 nanocapsules".JOURNAL OF PHYSICS D-APPLIED PHYSICS 42.4(2009):5.