Effect of exchange coupling in nanocrystalline CoPt bulk magnets

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	Effect of exchange coupling in nanocrystalline CoPt bulk magnets
	Q. F. Xiao; E. Bruck; Z. D. Zhang; F. R. de Boer; K. H. J. Buschow
	2002
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	91 期号:10 页码:8819-8821
摘要	The effect of the atomic disorder-order transformation on remanence enhancement and coercivity in isotropic CoPt magnets has been studied by isothermal annealing at 675 degreesC, well below the transformation temperature, for 10-80 min after quenching from 900 degreesC. The results of x-ray diffraction, alternating-current susceptibility, and magnetization measurements indicate that the strong remanence enhancement effect originates from exchange coupling between the face-centered-tetragonal ordered hard-magnetic precipitated phase and the face-centered-cubic disordered soft-magnetic matrix phase during the initial ordering transformation. The nonuniform distribution of the magnetic anisotropy results in a lower reversibility, unlike the so-called exchange spring magnet. (C) 2002 American Institute of Physics.
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	Alloy
URL	查看原文
WOS记录号	WOS:000175576400330
引用统计	被引频次：18[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/321006/36465
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. F. Xiao,E. Bruck,Z. D. Zhang,et al. Effect of exchange coupling in nanocrystalline CoPt bulk magnets[J]. Journal of Applied Physics,2002,91(10):8819-8821.
APA	Q. F. Xiao,E. Bruck,Z. D. Zhang,F. R. de Boer,&K. H. J. Buschow.(2002).Effect of exchange coupling in nanocrystalline CoPt bulk magnets.Journal of Applied Physics,91(10),8819-8821.
MLA	Q. F. Xiao,et al."Effect of exchange coupling in nanocrystalline CoPt bulk magnets".Journal of Applied Physics 91.10(2002):8819-8821.