Structure and magnetic properties of ScFe6Ga6-type RCo5Ga7 (R = Y, Tb, Dy, Ho and Er)

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	Structure and magnetic properties of ScFe6Ga6-type RCo5Ga7 (R = Y, Tb, Dy, Ho and Er)
	H. Chang; Y. Q. Guo; L. T. Yang; Q. L. Liua; W. C. Feng; J. K. Liang; G. H. Rao
	2004
发表期刊	Journal of Solid State Chemistry
ISSN	0022-4596
卷号	177 期号:11 页码:4341-4345
摘要	The structure and magnetic properties of the RCo5Ga7 (R = Y, Tb, Dy, Ho and Er) compounds with the ScFe6Ga6-type structure have been studied. The stability of RCo5Ga7 is closely related with the ratio of the metal radii R-RE/R-(Co,R-Ga). With R-RE/R-(Co,R-Ga) less than or equal to 1.36, the compounds can be stabilized in the ScFe6Ga6-type structure. The lattice of RCo5Ga7 shrinks as the atomic order of R increases, and it is consistent with the lanthanide contraction. The structure analysis based on X-ray diffraction patterns reveals that in the orthorhombic RCo5Ga7 (Immm), R occupies the 2a site, and Co enters into the 8k and the 4h sites, and Ga is at the 4e, 4f, 4g, 4h and 8k sites. The interatomic distances and the coordination numbers of RCo5Ga7 are provided from the refinement results. The short interatomic distance (less than 2.480 Angstrom) between the Co ions results in the negative magnetic interaction, which does not favor ferromagnetic ordering. The magnetic moment of YCo5Ga7 is absent, and RCo5Ga7 (R = Tb, Dy, Ho and Er) may have long-range magnetic ordering with the paramagnetic Curie temperature lower than 5 K. (C) 2004 Elsevier Inc. All rights reserved.
部门归属	chinese acad sci, inst semicond, beijing 100083, peoples r china. chinese acad sci, inst phys, beijing 100080, peoples r china. chinese acad sci, ctr condensed matter phys, beijing 100080, peoples r china. cent iron & steel res inst, div funct mat, beijing 100081, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;chang, h (reprint author), chinese acad sci, inst semicond, qinghua donglu jia 35,haidian dist, beijing 100083, peoples r china;chang_hong2@yahoo.com.cn
关键词	Crystal Structure Scfe6ga6-type Structure Magnetic Ordering Ferromagnetic Transition Neutron-diffraction Crystal-structure Lu Gd Sm Magnetoresistance Earth Metal Fe
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WOS记录号	WOS:000225508800067
引用统计	被引频次：5[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/321006/35317
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. Chang,Y. Q. Guo,L. T. Yang,et al. Structure and magnetic properties of ScFe6Ga6-type RCo5Ga7 (R = Y, Tb, Dy, Ho and Er)[J]. Journal of Solid State Chemistry,2004,177(11):4341-4345.
APA	H. Chang.,Y. Q. Guo.,L. T. Yang.,Q. L. Liua.,W. C. Feng.,...&G. H. Rao.(2004).Structure and magnetic properties of ScFe6Ga6-type RCo5Ga7 (R = Y, Tb, Dy, Ho and Er).Journal of Solid State Chemistry,177(11),4341-4345.
MLA	H. Chang,et al."Structure and magnetic properties of ScFe6Ga6-type RCo5Ga7 (R = Y, Tb, Dy, Ho and Er)".Journal of Solid State Chemistry 177.11(2004):4341-4345.