Phase transformation and magnetic properties of Fe-Pt-based bulk alloys

doi:10.1016/S0925-8388(03)00608-X

IMR OpenIR

	Phase transformation and magnetic properties of Fe-Pt-based bulk alloys
	Xiao, QF ; Bruck, E ; Zhang, ZD ; de Boer, FR ; Buschow, KHJ
通讯作者	Buschow, KHJ(buschow@science.uva.nl)
	2004-02-11
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	364 期号:1-2 页码:315-322
摘要	The ordering transformation and magnetic properties of Fe59.75Pt39.5Nb0.75 bulk alloys have been investigated in detail by using different homogenization temperatures and different low-temperature annealing times to obtain samples with different microstructure and different atomically ordered states. The experimental results indicate that the disorder-order transformation temperature for the presently studied alloys is around 950degreesC. When using high homogenization temperatures (in the range 1100-1350degreesC) and medium quenching rates, one can reach high nucleation rates of the atomically ordered phase, so that a fine microstructure of ordered regions with dimensions of 10-20 nm is obtained. A uniform nanoscale microstructure with a wide distribution in the degree of order can be obtained by properly controlling the quenching rate and the annealing time. In this way, a high remanence ratio (M-r = 0.74) can be obtained by profiting from the nanocomposite exchange coupling between nearest-neighbor ordered regions with different magnetic anisotropy. We found that, in the present off-stoichiometric magnetic alloy system, the fct phase is magnetically not very hard, like the Nd2Fe14B phase, and that the fcc phase is not truly magnetically soft due to an increase in the degree of atomic order. Therefore, the samples do not possess the features of an exchange spring magnet as the iron-rich Nd-Fe-B magnets, although the exchange coupling still results in a strong remanence enhancement. (C) 2003 Elsevier B.V. All rights reserved.
关键词	transition metal compounds permanent magnets phase transition magnetic measurements
DOI	10.1016/S0925-8388(03)00608-X
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000187951500052
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/81832
通讯作者	Buschow, KHJ
作者单位	1.Univ Amsterdam, Van der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands 2.Chinese Acad Sci, Inst Met Res, Shenyang 110015, Peoples R China
推荐引用方式 GB/T 7714	Xiao, QF,Bruck, E,Zhang, ZD,et al. Phase transformation and magnetic properties of Fe-Pt-based bulk alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2004,364(1-2):315-322.
APA	Xiao, QF,Bruck, E,Zhang, ZD,de Boer, FR,&Buschow, KHJ.(2004).Phase transformation and magnetic properties of Fe-Pt-based bulk alloys.JOURNAL OF ALLOYS AND COMPOUNDS,364(1-2),315-322.
MLA	Xiao, QF,et al."Phase transformation and magnetic properties of Fe-Pt-based bulk alloys".JOURNAL OF ALLOYS AND COMPOUNDS 364.1-2(2004):315-322.