Structure transformation and magnetisms in Ho2Ni7-xFex compounds

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	Structure transformation and magnetisms in Ho2Ni7-xFex compounds
	Yang, YQ ; Gao, QQ ; Li, GN
刊名	ACTA PHYSICA SINICA
	2013
卷号	62 期号:1
关键词	composite structure Ho2Ni7-xFex compounds structure transition magnetism
ISSN号	1000-3290
通讯作者	Yang, YQ (reprint author), Jiangxi Univ Sci & Technol, Ganzhou 341000, Peoples R China.
中文摘要	Based on the composite compounds Ho2Ni7-xFex (x = 0-3.0), a method of describing the structure transition from rhombohedral to hexagonal is discussed in terms of free electron concentration. The transition is investigated by X-ray powder diffraction and magnetic analysis. The compounds crystallize into the rhombohedral Gd2Co7-type structure for x = 0-0.5 and into the hexagonal Ce2Ni7-type structure for x = 0.5-2.5. The values of lattice parameters a and c of the Ho(2)Ni(7-)xFe(x) compounds increase with the addition of Fe, and the saturation magnetization M-s decreases with Fe content increasing at a rate of dM(s)/dx = -2, manifesting antiparallel alignments of the Fe and Ho moment. The higher the free electron concentration, the stabler the rhombohedral structure is, otherwise the hexagonal structure is stabler, which provides a meaningful parameter to distinguish the two allotropies in composite structure intermetallics.
资助信息	National Natural Science Foundation of China [50631040]
语种	中文
公开日期	2014-01-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57495]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Yang, YQ,Gao, QQ,Li, GN. Structure transformation and magnetisms in Ho2Ni7-xFex compounds[J]. ACTA PHYSICA SINICA,2013,62(1).
APA	Yang, YQ,Gao, QQ,&Li, GN.(2013).Structure transformation and magnetisms in Ho2Ni7-xFex compounds.ACTA PHYSICA SINICA,62(1).
MLA	Yang, YQ,et al."Structure transformation and magnetisms in Ho2Ni7-xFex compounds".ACTA PHYSICA SINICA 62.1(2013).