Remanence enhancement and coercivity in two-phase CoPt bulk magnets

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	Remanence enhancement and coercivity in two-phase 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:1 页码:304-307
摘要	We have studied the effect of the atomic disorder-order transformation on remanence enhancement and coercivity in CoPt ingots by isothermal annealing at various temperatures well below the transformation point. The relative amount of the low-temperature hard-magnetic face-centered-tetragonal (fct) phase precipitated in the high-temperature magnetically soft face-centered-cubic (fcc) phase was determined by means of x-ray diffraction. As a function of annealing temperature, the mean grain size and the relative amount of the fct phase increase at the cost of the fcc phase. These changes were followed by means of magnetic measurements. We observed a continuous increase in coercivity with increasing annealing temperature, eventually reaching a maximum. The Kneller-Hawig model was used to explain the occurrence of remanence enhancement and the continuously changing degree of exchange coupling between the magnetically soft and hard phases. (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;qfxiao@wins.uva.nl
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WOS记录号	WOS:000172835600048
引用统计	被引频次：17[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/321006/36466
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. Remanence enhancement and coercivity in two-phase CoPt bulk magnets[J]. Journal of Applied Physics,2002,91(1):304-307.
APA	Q. F. Xiao,E. Bruck,Z. D. Zhang,F. R. de Boer,&K. H. J. Buschow.(2002).Remanence enhancement and coercivity in two-phase CoPt bulk magnets.Journal of Applied Physics,91(1),304-307.
MLA	Q. F. Xiao,et al."Remanence enhancement and coercivity in two-phase CoPt bulk magnets".Journal of Applied Physics 91.1(2002):304-307.