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
刊名	Journal of Applied Physics
	2002
卷号	91 期号:10 页码:8819-8821
关键词	alloy
ISSN号	0021-8979
中文摘要	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.
原文出处	://WOS:000175576400330
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/36465]
专题	金属研究所_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.