Effect of grain size and magnetocrystalline anisotropy on exchange coupling in nanocomposite two-phase Nd-Fe-B magnets

IMR OpenIR

	Effect of grain size and magnetocrystalline anisotropy on exchange coupling in nanocomposite two-phase Nd-Fe-B magnets
	Q. F. Xiao; T. Zhao; Z. D. Zhang; E. Bruck; K. H. J. Buschow; F. R. de Boer
	2001
发表期刊	Journal of Magnetism and Magnetic Materials
ISSN	0304-8853
卷号	223 期号:3 页码:215-220
摘要	We have studied the exchange coupling in two-phase nanocrystalline alloy ribbons of the composition Nd-4-xSmxFe77.5B18.5 (x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5). The grain size of the Fe3B phase changed from 16 to 23 nm by annealing between 670 degreesC and 760 degreesC for 5 min. From the measurements of the magnetic properties and the reversibility of magnetization, we derived that the mean critical grain size of the Fe3B phase required for full exchange coupling by the Nd2Fe14B phase is about 20 nm. A detailed study of the magnetization-reversal process was made on samples in which the magnetocrystalline anisotropy of the Nd2Fe14B phase was reduced by substitution of Sm for Nd. We showed that the exchange-coupled range can be markedly expanded and that the reduced remanence can be increased with increasing Sm content. (C) 2001 Elsevier Science B.V. All rights reserved.
部门归属	univ amsterdam, van der waals zeeman inst, nl-1018 xe amsterdam, netherlands. chinese acad sci, inst met res, shenyang 110015, peoples r china.;xiao, qf (reprint author), univ amsterdam, van der waals zeeman inst, valckenierstr 65, nl-1018 xe amsterdam, netherlands
关键词	Nanocomposite Magnet Magnetocrystalline Anisotropy Exchange Coupling Nd-fe-b
URL	查看原文
WOS记录号	WOS:000166818200003
引用统计	被引频次：34[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/321006/36850
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. F. Xiao,T. Zhao,Z. D. Zhang,et al. Effect of grain size and magnetocrystalline anisotropy on exchange coupling in nanocomposite two-phase Nd-Fe-B magnets[J]. Journal of Magnetism and Magnetic Materials,2001,223(3):215-220.
APA	Q. F. Xiao,T. Zhao,Z. D. Zhang,E. Bruck,K. H. J. Buschow,&F. R. de Boer.(2001).Effect of grain size and magnetocrystalline anisotropy on exchange coupling in nanocomposite two-phase Nd-Fe-B magnets.Journal of Magnetism and Magnetic Materials,223(3),215-220.
MLA	Q. F. Xiao,et al."Effect of grain size and magnetocrystalline anisotropy on exchange coupling in nanocomposite two-phase Nd-Fe-B magnets".Journal of Magnetism and Magnetic Materials 223.3(2001):215-220.