Structure dependence of magnetic properties of Pr5Si2Ge2

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	Structure dependence of magnetic properties of Pr5Si2Ge2
	H. F. Yang; G. H. Rao; G. Y. Liu; Z. W. Ouyang; X. M. Feng; W. F. Liu; W. G. Chu; J. K. Liang
	2002
发表期刊	Journal of Physics-Condensed Matter
ISSN	0953-8984
卷号	14 期号:41 页码:9705-9711
摘要	The crystal structure and magnetic and electronic transport properties of the ternary intermediate compound Pr5Si2Ge2 were investigated by means of x-ray powder diffraction, magnetic and electrical resistance measurements. The compound has two polymorphs: alpha-Pr5Si2Ge2 crystallizing in a monoclinic structure with space group P112(1)/a, for the as-cast sample, and alpha-Pr5Si2Ge2 crystallizing in a tetragonal structure with space group P4(1)2(1)2, for. the sample annealed at 1273 K. The average interatomic distances of magnetic Pr atoms and the amounts of covalent (Si, Ge)-(Si, Ge) bond pairs in these two phases are different, which may be, responsible for their different magnetic properties. The Curie temperatures T-C of alpha-Pr5Si2Ge2 and beta-Pr5Si2Ge2 are 38 and 50 K, respectively. An irreversibility between zero-field-cooling and field-cooling magnetization curves is observed. The zero-field resistance of these two phases exhibits an anomaly near T-C. On the basis of the results of magnetic and electrical resistance measurements, it is inferred that both of these phases exhibit spin-glass-like behaviour. The magnetic properties and structure dependence of the Pr5Si2Ge2 can be elucidated well using the Ruderman-Kittel-Kasuya-Yosida model.
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.;yang, hf (reprint author), chinese acad sci, inst phys, pob 603, beijing 100080, peoples r china
关键词	Transition Gd-5(Si2ge2) Gd-5(Sixge1-x)(4) Gd-5(Si1.8ge2.2)
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WOS记录号	WOS:000179214300028
引用统计	被引频次：8[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/321006/36487
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. F. Yang,G. H. Rao,G. Y. Liu,et al. Structure dependence of magnetic properties of Pr5Si2Ge2[J]. Journal of Physics-Condensed Matter,2002,14(41):9705-9711.
APA	H. F. Yang.,G. H. Rao.,G. Y. Liu.,Z. W. Ouyang.,X. M. Feng.,...&J. K. Liang.(2002).Structure dependence of magnetic properties of Pr5Si2Ge2.Journal of Physics-Condensed Matter,14(41),9705-9711.
MLA	H. F. Yang,et al."Structure dependence of magnetic properties of Pr5Si2Ge2".Journal of Physics-Condensed Matter 14.41(2002):9705-9711.