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)
	Chang H ; Guo YQ ; Yang LT ; Liua, QL ; Feng WC ; Liang JK ; Rao GH
刊名	journal of solid state chemistry
	2004
卷号	177 期号:11 页码:4341-4345
关键词	crystal structure
ISSN号	0022-4596
通讯作者	chang, h, chinese acad sci, inst semicond, qinghua donglu jia 35,haidian dist, beijing 100083, peoples r china. 电子邮箱地址: chang_hong2@yahoo.com.cn
中文摘要	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.
学科主题	半导体材料
收录类别	SCI
语种	英语
公开日期	2010-03-17
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/8932]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Chang H,Guo YQ,Yang LT,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	Chang H.,Guo YQ.,Yang LT.,Liua, QL.,Feng WC.,...&Rao GH.(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	Chang H,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.