Effect of boron on structure and magnetic properties of magnetostrictive compound Dy0.7Pr0.3Fe2

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	Effect of boron on structure and magnetic properties of magnetostrictive compound Dy0.7Pr0.3Fe2
	W. J. Ren; Z. D. Zhang; J. P. Liu; X. G. Zhao; W. Liu; D. Y. Geng; X. M. Jin
	2002
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	91 期号:10 页码:8207-8209
摘要	Crystal structure, magnetic properties and magnetostriction of Dy0.7Pr0.3(Fe1-xBx)(2) (0less than or equal toxless than or equal to0.20) have been investigated by means of x-ray diffraction, ac initial susceptibility, a vibrating sample magnetometer, and a standard strain technique. The matrix of Dy0.7Pr0.3Fe2 alloy consists of (Dy,Pr)Fe-2 phase with a cubic MgCu2-type structure and some amount of (Dy,Pr)Fe-3 phase with a rhombohedral PuNi3-type structure. The introduction of boron effectively restrains the emergence of the iron-rich phase and thus decreases the amount of (Dy,Pr)Fe-3 phase. Dy0.7Pr0.3(Fe1-xBx)(2) alloy with x=0.05 contains small amount of (Dy,Pr)(Fe,B)(3) phase, and those with x=0.10 and x=0.15 are essentially of a single (Dy,Pr)(Fe,B)(2) phase. An unidentified minor phase appears when x=0.20. The lattice parameter of (Dy,Pr)(Fe,B)(2) phase decreases monotonically with the boron substitution up to x=0.20, indicating that the boron atoms occupy the substitutional sites. The Curie temperature for (Dy,Pr)(Fe,B)(2) phase obviously increases compared with the boron free one. The saturation magnetization at room temperature increases with increasing boron content for the alloys studied, suggesting that the partial boron substitution is beneficial to the increment of the exchange interactions in the Dy0.7Pr0.3Fe2 system. The increment of the magnetization originates from the decrement of iron content, because the Fe moment that aligns antiparallel with the Dy moment almost keeps constant in this system. Boron substitution for iron increases the lattice distortion and anisotropy, thus causes the decrease of the linear magnetostriction lambda(a)=lambda(parallel to)-lambda(perpendicular to) at the room temperature. (C) 2002 American Institute of Physics.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. louisiana tech univ, inst micromfg, ruston, la 71272 usa.;ren, wj (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china
关键词	Tb0.3dy0.7fe2 Alloy
URL	查看原文
WOS记录号	WOS:000175576400127
引用统计	被引频次：21[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/321006/36405
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. J. Ren,Z. D. Zhang,J. P. Liu,et al. Effect of boron on structure and magnetic properties of magnetostrictive compound Dy0.7Pr0.3Fe2[J]. Journal of Applied Physics,2002,91(10):8207-8209.
APA	W. J. Ren.,Z. D. Zhang.,J. P. Liu.,X. G. Zhao.,W. Liu.,...&X. M. Jin.(2002).Effect of boron on structure and magnetic properties of magnetostrictive compound Dy0.7Pr0.3Fe2.Journal of Applied Physics,91(10),8207-8209.
MLA	W. J. Ren,et al."Effect of boron on structure and magnetic properties of magnetostrictive compound Dy0.7Pr0.3Fe2".Journal of Applied Physics 91.10(2002):8207-8209.