Magnetic structure and preferential occupation of Fe in the composite compound Nd2Co6Fe

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	Magnetic structure and preferential occupation of Fe in the composite compound Nd2Co6Fe
	Yang, YQ ; Wang, T ; Li, GN ; Huang, Q ; Gao, QQ ; Li, JB ; Liu, GY ; Luo, J ; Rao, GH
刊名	PHYSICA B-CONDENSED MATTER
	2011
卷号	406 期号:10 页码:1995
关键词	NEUTRON POWDER-DIFFRACTION INTERMETALLIC COMPOUNDS FIELD
ISSN号	0921-4526
通讯作者	Rao, GH: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	The crystal and magnetic structures of the composite compound Nd2Co6Fe have been investigated by high-resolution neutron powder diffraction and X-ray powder diffraction. The compound crystallizes in the hexagonal Ce2Ni7-type structure consisting of Nd(Co,Fe)(2) and Nd(Co,Fe)(5) structural blocks alternately stacked along the c-axis. Multi-pattern Rietveld refinement of neutron diffraction and X-ray diffraction data at room temperature reveal that substitution of Fe for Co occurs exclusively in the Nd(Co, Fe)(5) structural blocks. The preferential occupation of the Fe atoms in the structure is discussed based on the mixing enthalpy between Nd and Fe atoms and on the lattice distortions. In agreement with the reported magnetic phase diagram of the Nd2Co7-xFex compounds, magnetic structure models with the moments of all atoms in the ab plane at 300 K and along the c-axis at 450 K provide a satisfactory fitting to the experimental neutron diffraction data. The refinement results show that the atomic moments of (Co, Fe) atoms within the Nd(Co, Fe)(5) blocks decrease slightly with temperature, whereas the atomic moments of Nd in the compound and of (Co, Fe) atoms at the interface between the Nd(Co,Fe)(2) and Nd(Co,Fe)(5) blocks are reduced significantly. (C) 2011 Elsevier B. V. All rights reserved.
收录类别	SCI
资助信息	National Natural Science Foundation of China [50631040]; National Basic Research Program of China [2006CB601101, 2006CB605101]
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/41426]
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,Wang, T,Li, GN,et al. Magnetic structure and preferential occupation of Fe in the composite compound Nd2Co6Fe[J]. PHYSICA B-CONDENSED MATTER,2011,406(10):1995.
APA	Yang, YQ.,Wang, T.,Li, GN.,Huang, Q.,Gao, QQ.,...&Rao, GH.(2011).Magnetic structure and preferential occupation of Fe in the composite compound Nd2Co6Fe.PHYSICA B-CONDENSED MATTER,406(10),1995.
MLA	Yang, YQ,et al."Magnetic structure and preferential occupation of Fe in the composite compound Nd2Co6Fe".PHYSICA B-CONDENSED MATTER 406.10(2011):1995.