Particle size dependent hysteresis loss in La0.7Ce0.3Fe11.6Si1.4C0.2 first-order systems

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	Particle size dependent hysteresis loss in La0.7Ce0.3Fe11.6Si1.4C0.2 first-order systems
	Hu, FX ; Chen, L ; Wang, J ; Bao, LF ; Sun, JR ; Shen, BG
刊名	APPLIED PHYSICS LETTERS
	2012
卷号	100 期号:7
关键词	MAGNETIC-FIELD ALLOYS LA(FE
ISSN号	0003-6951
通讯作者	Hu, FX (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	Here, we report particle size dependent hysteresis loss in La0.7Ce0.3Fe11.6Si1.4C0.2. Hysteresis loss was getting smaller with reducing the particle size. The reduced ratio can be as high as similar to 61% as the sample is ground from bulk into small particles (20-50 mu m). Such reduction can be ascribed to the notably increased surface area of sample and the partially removed internal strain and grain boundaries, other than nucleation factors and electronic band structure. Meanwhile, entropy change vertical bar Delta S vertical bar slightly decreases, but the effective refrigeration capacity shows an increase due to the notable reduction of hysteresis loss. Our investigations also reveal particle size limitation. When the size is below 10 mu m (average similar to 4 mu m), the sample may lose its stability and the vertical bar Delta S vertical bar notably reduces. (C) 2012 American Institute of Physics. [doi:10.1063/1.3684244]
收录类别	SCI
资助信息	National Natural Science Foundation of China; Hi-Tech Research and Development Program of China; National Basic Research Program of China; Chinese Academy of Sciences
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/50584]
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	Hu, FX,Chen, L,Wang, J,et al. Particle size dependent hysteresis loss in La0.7Ce0.3Fe11.6Si1.4C0.2 first-order systems[J]. APPLIED PHYSICS LETTERS,2012,100(7).
APA	Hu, FX,Chen, L,Wang, J,Bao, LF,Sun, JR,&Shen, BG.(2012).Particle size dependent hysteresis loss in La0.7Ce0.3Fe11.6Si1.4C0.2 first-order systems.APPLIED PHYSICS LETTERS,100(7).
MLA	Hu, FX,et al."Particle size dependent hysteresis loss in La0.7Ce0.3Fe11.6Si1.4C0.2 first-order systems".APPLIED PHYSICS LETTERS 100.7(2012).