Large magnetocaloric effect in CrO2/TiO2 epitaxial films above room temperature

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	Large magnetocaloric effect in CrO2/TiO2 epitaxial films above room temperature
	T. Jiang; L. Xie; Y. P. Yao; Y. K. Liu; X. G. Li
	2012
发表期刊	Materials Letters
ISSN	0167-577X
卷号	76 页码:25-27
摘要	The magnetocaloric properties of the CrO2 single crystal films epitaxially grown on TiO2 (100) substrates are studied by dc magnetization measurements. It is reported first time that there is a large magnetocaloric effect (MCE) over a wide temperature range in the vicinity of Curie temperature of CrO2 film. The magnetic entropy change increases monotonically with increasing magnetic fields and reaches a value of 8.46 J/kg.K at 385 K for the field varies from 0 to 51, which is the one among the highest for magnetic oxides and comparable to that for Gd. More interestingly the calculated relative cooling power values of CrO2 are found to vary from 143 J/kg at 1.5 T to 410J/kg at 5 T, much larger than that of CrO2 particles, due to a wide distribution of magnetic entropy changes. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
部门归属	[li, xiaoguang] univ sci & technol china, hefei natl lab phys sci microscale, dept phys, hefei 230026, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;li, xg (reprint author), univ sci & technol china, hefei natl lab phys sci microscale, dept phys, hefei 230026, peoples r china.;lixg@ustc.edu.cn
关键词	Epitaxial Growth Thin Films Magnetic Material Magnetic Entropy Changes Magnetic Entropy Change Phase-transition Perovskite Oxides Cro2
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60024
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	T. Jiang,L. Xie,Y. P. Yao,et al. Large magnetocaloric effect in CrO2/TiO2 epitaxial films above room temperature[J]. Materials Letters,2012,76:25-27.
APA	T. Jiang,L. Xie,Y. P. Yao,Y. K. Liu,&X. G. Li.(2012).Large magnetocaloric effect in CrO2/TiO2 epitaxial films above room temperature.Materials Letters,76,25-27.
MLA	T. Jiang,et al."Large magnetocaloric effect in CrO2/TiO2 epitaxial films above room temperature".Materials Letters 76(2012):25-27.