Anomalous low temperature spin reorientation in carbon substituted Pr-Co-B-C alloys

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	Anomalous low temperature spin reorientation in carbon substituted Pr-Co-B-C alloys
	X. G. Zhao; W. B. Cui; X. K. Lv; W. J. Ren; D. Li; W. Liu; Z. D. Zhang
	2008
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	103 期号:7
摘要	We studied the effects of C substitution for B on structural and magnetic properties of Pr(16)Co(76)B(8-x)C(x) (0 <= x <= 8) alloys, prepared by mechanical alloying and subsequent annealing. An attempt to synthesize Pr(2)Co(14)C compound has been carried out by a gradual C substitution of B in Pr(16)Co(76)B(8). The x-ray diffraction results show that after annealed at 1073 K for 30 min, Pr(2)Co(14)(B,C) phase with tetragonal Nd(2)Fe(14)B-type structure is formed as the main phase for 0 <= x <= 7. The Pr(2)Co(14)C phase has not been observed in mechanical alloyed B-free powders (x=8). The lattice parameter c of the Pr(2)Co(14)(B,C) phase decreases with increasing the carbon content. The highest coercivity of 21.9 kOe has been obtained in Pr(16)Co(76)B(6)C(2) alloys. The spin-reorientation temperature T(SR1) increases with increasing the carbon content from 663 K for x=0 to 685 K for x=7. However, the spin reorientation is observed at 40 K for Pr(16)Co(76)B(6)C(2) and then the spin-reorientation temperature T(SR2) is nearly unchanged at 125 K for Pr(16)Co(76)B(8-x)C(x) alloys with x=4, 6, and 7, which may be caused by the solubility of carbon atoms. The anomaly of the spin reorientation observed at low temperatures in C-substituted Pr(16)Co(76)B(8-x)C(x) (x=2, 4, 6, and 7) alloys may be related to the Pr(3+) instability. (C) 2008 American Institute of Physics.
部门归属	chinese acad sci, sheyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;zhao, xg (reprint author), chinese acad sci, sheyang natl lab mat sci, inst met res, shenyang 110016, peoples r china;xgzhao@imr.ac.cn
关键词	Magnetic-properties Permanent-magnets Nd
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WOS记录号	WOS:000255043200515
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33373
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. G. Zhao,W. B. Cui,X. K. Lv,et al. Anomalous low temperature spin reorientation in carbon substituted Pr-Co-B-C alloys[J]. Journal of Applied Physics,2008,103(7).
APA	X. G. Zhao.,W. B. Cui.,X. K. Lv.,W. J. Ren.,D. Li.,...&Z. D. Zhang.(2008).Anomalous low temperature spin reorientation in carbon substituted Pr-Co-B-C alloys.Journal of Applied Physics,103(7).
MLA	X. G. Zhao,et al."Anomalous low temperature spin reorientation in carbon substituted Pr-Co-B-C alloys".Journal of Applied Physics 103.7(2008).