Structure, magnetic properties, and magnetovolume effect of Nd3Fe26.5Re2.5

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	Structure, magnetic properties, and magnetovolume effect of Nd3Fe26.5Re2.5
	W. G. Chu ; G. H. Rao ; H. F. Yang ; G. Y. Liu ; W. F. Liu ; J. K. Liang
刊名	Journal of Physics-Condensed Matter
	2002
卷号	14 期号:19 页码:5035-5043
关键词	intermetallic compounds crystal-structure mn cr behavior alloys phase order m=ti t=ti
ISSN号	0953-8984
中文摘要	A novel compound Nd3Fe26.5Re2.5 was synthesized. The structure and magnetic properties of the compound were investigated by means of x-ray powder diffraction (XRD) analysis and magnetic measurements. Nd3Fe26.5Re2.5 crystallizes in a monoclinic Nd-3(Fe, Ti)(29) structure with space group A2/m. The lattice constants of Nd3Fe26.5Re2.5 are a = 10.6131(l) Angstrom, b = 8.5897(1) Angstrom, c = 9.7518(1) Angstrom, and beta = 96.69(4)degrees, respectively. Rietveld refinement of the XRD data reveals that the Re atoms have a strong preference to occupy the three dumb-bell 4g, 4i3, and 4i4 sites. The preferential occupancy of the Re is predominantly determined by the atomic size effect. The final refined stoichiometry Nd3Fe26.65Re2.35 is in good agreement with the result of chemical analysis: Nd3Fe26.6(1)Re2.39(3). Nd3Fe26.5Re2.5 is found to be of planar anisotropy perpendicular to the [204] direction at room temperature. The Curie temperature T-C, saturation magnetization MS, and magnetocrystalline anisotropy field H-A are 354 K, 52.9 muB/f.u., and 20.6 T, respectively. The relatively low TC is related to the preferential occupations of the Re of the 4g, 40, and 4i4 sites. The temperature-dependent XRD experiment shows a contraction of the unit-cell volume with temperature around T-C, which can be ascribed to the vanishing magnetism. The magnetism has a significant effect on the lattice parameters a, b, c, and, which is anisotropic in character.
原文出处	://WOS:000175951700026
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/36244]
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	W. G. Chu,G. H. Rao,H. F. Yang,et al. Structure, magnetic properties, and magnetovolume effect of Nd3Fe26.5Re2.5[J]. Journal of Physics-Condensed Matter,2002,14(19):5035-5043.
APA	W. G. Chu,G. H. Rao,H. F. Yang,G. Y. Liu,W. F. Liu,&J. K. Liang.(2002).Structure, magnetic properties, and magnetovolume effect of Nd3Fe26.5Re2.5.Journal of Physics-Condensed Matter,14(19),5035-5043.
MLA	W. G. Chu,et al."Structure, magnetic properties, and magnetovolume effect of Nd3Fe26.5Re2.5".Journal of Physics-Condensed Matter 14.19(2002):5035-5043.