Remanence enhancement in nanocrystalline CoPt bulk magnets

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	Remanence enhancement in nanocrystalline CoPt bulk magnets
	Xiao, QF ; Bruck, E ; Zhang, ZD ; de Boer, FR ; Buschow, KHJ
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2002-04-18
卷号	336 期号:1-2 页码:41-45
关键词	transition metal alloys crystal structure permanent magnets anisotropy magnetic measurements
ISSN号	0925-8388
通讯作者	Xiao, QF()
英文摘要	The effect of the atomic disorder-order transformation on remanence enhancement and coercivity in isotropic CoPt magnets has been studied by isothermal annealing at 675degreesC, well below the transformation temperature, for 10-80 min after quenching in ice-water from 900degreesC. The results of X-ray diffraction, transmission electron microscopy, alternating-current (ac) susceptibility and magnetization measurements indicate that the strong remanence enhancement effect originates from exchange coupling between the face-centered-tetragonal (fet) ordered hard-magnetic precipitated phase and the face-centered-cubic (fec) disordered soft-magnetic matrix phase during the initial ordering transformation. The non-uniform distribution of the magnetic anisotropy results in a lower reversibility, unlike the so-called exchange spring magnet. (C) 2002 Elsevier Science B.V. All rights reserved.
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000174761400008
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/114266]
专题	金属研究所_中国科学院金属研究所
通讯作者	Xiao, QF
作者单位	1.Univ Amsterdam, Van Der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands 2.Chinese Acad Sci, Met Res Inst, Shenyang 110015, Peoples R China
推荐引用方式 GB/T 7714	Xiao, QF,Bruck, E,Zhang, ZD,et al. Remanence enhancement in nanocrystalline CoPt bulk magnets[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2002,336(1-2):41-45.
APA	Xiao, QF,Bruck, E,Zhang, ZD,de Boer, FR,&Buschow, KHJ.(2002).Remanence enhancement in nanocrystalline CoPt bulk magnets.JOURNAL OF ALLOYS AND COMPOUNDS,336(1-2),41-45.
MLA	Xiao, QF,et al."Remanence enhancement in nanocrystalline CoPt bulk magnets".JOURNAL OF ALLOYS AND COMPOUNDS 336.1-2(2002):41-45.