Syntheses, crystal structure and magnetic properties of Rm+nCo5m+3nB2n

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	Syntheses, crystal structure and magnetic properties of Rm+nCo5m+3nB2n
	J. K. Liang; Y. Chen; X. L. Chen
	2001
发表期刊	Progress in Natural Science
ISSN	1002-0071
卷号	11 期号:12 页码:881-892
摘要	The phase relations at the 600 degreesC and 700 degreesC isothermal sections of the ternary systems R-Co-B for R Nd, Pr and R = Sm, Cd respectively were summarized in this paper. For Rm+nCo5m+3nB2n, two new types of compounds R3Co13B2 ( R = Pr, Nd, Sm, Gd, Dy, Ho, Er, Y) (m = 2, n = 1) and R5Co19B6 (R = Pr, Nd) (m = 2, n = 3) were synthesized by utilizing the principle of structural combination. Their crystal* structures and easy magnetization direction were determined by X-ray powder diffraction, and structures were refined by the Rietveld method. The Curie temperature T-C, saturation magnetization M-s and anisotropic field H-A of the new compounds were measured using a vibrating-sample magnetometer, an extraction sample magnetometer and M(H) - H curves of samples in different magnetization directions respectively. The T-C and M-s of Rm+nCo5m+3nB2n increase with increasing values of m at a given n value. H-A increases with an increase in n when m is kept invariable. The effects of the substitution of Ni for Co on the magnetic properties of Nd13Co15-xNixB2 were also investigated. It was found that T-SR decreased monotonously as the concentration of Ni increased, and at x = 3 the easy magnetization direction becomes axial at room temperature. The relations between crystal structure and magnetic properties of Rm+nCo5m+3nB2n and the possible routes of synthesizing permanent magnetic materials are also discussed.
部门归属	chinese acad sci, inst phys, beijing 100080, peoples r china. chinese acad sci, ctr condensed matter phys, beijing 100080, peoples r china. acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;liang, jk (reprint author), chinese acad sci, inst phys, pob 603, beijing 100080, peoples r china
关键词	R-co-b Ternary Systems R3co13b2 P5co19b6 Crystal Structure Magnetic Properties Co-b Phase Relation Permanent-magnets Nd Borides Sm Gd Fe
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WOS记录号	WOS:000172496900001
引用统计	被引频次：2[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/321006/36711
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. K. Liang,Y. Chen,X. L. Chen. Syntheses, crystal structure and magnetic properties of Rm+nCo5m+3nB2n[J]. Progress in Natural Science,2001,11(12):881-892.
APA	J. K. Liang,Y. Chen,&X. L. Chen.(2001).Syntheses, crystal structure and magnetic properties of Rm+nCo5m+3nB2n.Progress in Natural Science,11(12),881-892.
MLA	J. K. Liang,et al."Syntheses, crystal structure and magnetic properties of Rm+nCo5m+3nB2n".Progress in Natural Science 11.12(2001):881-892.