Effects of the doping element on crystal structure and magnetic properties of Sm(CO,M)(7) compounds (M = Si, Cu, Ti, Zr, and Hf)

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	Effects of the doping element on crystal structure and magnetic properties of Sm(CO,M)(7) compounds (M = Si, Cu, Ti, Zr, and Hf)
	J. Luo; J. K. Liang; Y. Q. Guo; Q. L. Liu; F. S. Liu; Y. Zhang; L. T. Yang; G. H. Rao
	2005
发表期刊	Intermetallics
ISSN	0966-9795
卷号	13 期号:7 页码:710-716
摘要	The crystal structure and magnetic properties of Sm(CO,M)(7) (M = Si, Cu, Ti, Zr, and Hf) compounds with the TbCu7-type structure have been investigated by means of X-ray powder diffraction and magnetic measurements. For the Sm(Co,M)(7) compounds, the formation of the compound is dominated by the enthalpy of formation of Mco(7), atomic radius ratio of Sm to (Co, M) and the electronic configuration of the doping element M, while the site occupation of M is determined by the enthalpies of solution of M in liquid Sm and Co as well as by the electronegativity difference among M, Sm and Co. However, the Sm(Co,Cu)(7) compounds exhibit different stabilizing mechanism, which may be due to the large mutual solubility between Co and Cu in the Sm(Co,Cu)(7). The stabilizing element Si and Cu prefer to occupy the 3g site, whereas Ti, Zr and Hf have preference to occupy the 2e site. Both the saturation magnetization and Curie temperature of the Sm(Co,M)(7) compounds decrease with increasing M content, while the magnetic anisotropy increases with increasing M content. The magnetic anisotropy field is related closely to the content and site occupation of the doping element M, which agrees with the theoretical analysis based on the individual site contribution model. (c) 2004 Published by Elsevier Ltd.
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 110016, peoples r china. cent iron & steel res inst, inst funct mat, beijing 100081, peoples r china.;liang, jk (reprint author), chinese acad sci, inst phys, pob 603, beijing 100080, peoples r china;jkliang@aphy.iphy.ac.cn
关键词	Rare-earth Intermetallics Magnetic Properties Phase Stability Prediction Diffraction Permanent-magnets Intrinsic-coercivity Alloys Substitution Nd Sm Anisotropy X=0-0.8 Heat Base
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/40025
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Luo,J. K. Liang,Y. Q. Guo,et al. Effects of the doping element on crystal structure and magnetic properties of Sm(CO,M)(7) compounds (M = Si, Cu, Ti, Zr, and Hf)[J]. Intermetallics,2005,13(7):710-716.
APA	J. Luo.,J. K. Liang.,Y. Q. Guo.,Q. L. Liu.,F. S. Liu.,...&G. H. Rao.(2005).Effects of the doping element on crystal structure and magnetic properties of Sm(CO,M)(7) compounds (M = Si, Cu, Ti, Zr, and Hf).Intermetallics,13(7),710-716.
MLA	J. Luo,et al."Effects of the doping element on crystal structure and magnetic properties of Sm(CO,M)(7) compounds (M = Si, Cu, Ti, Zr, and Hf)".Intermetallics 13.7(2005):710-716.