Structural evolution of Ce1-xGdxFeAsO0.84F0.16 superconductors

doi:10.1063/1.3565408

IMR OpenIR

	Structural evolution of Ce1-xGdxFeAsO0.84F0.16 superconductors
	Yang, J. L.; Ren, W. J.1; Li, D.; Zhang, Z. D.
通讯作者	Ren, W. J.(wjren@imr.ac.cn)
	2011-04-01
发表期刊	JOURNAL OF APPLIED PHYSICS
ISSN	0021-8979
卷号	109 期号:7 页码:3
摘要	Structural parameters have a critical impact on superconductivity in iron-based oxypnictide superconductors. Structural evolution study was performed on Ce1-xGdxFeAsO0.84F0.16 superconductors by the analysis of the x-ray diffraction patterns with Rietveld refinement. Substitution of Gd for Ce generates internal pressure that compresses the crystal lattice. The contraction of the c axis is also indicated by the reduction of Ce/Gd-As and Ce/Gd-O/F distances, while there is a slight increase in the As-Fe-As block size, which is compensated by a large reduction in the Ce/Gd-O/F-Ce/Gd block with Gd substitution. The diagonal Fe-As-Fe angle for Ce0.6Gd0.4FeAsO0.84F0.16, with the highest T-c among Ce1-xGdxFeAsO0.84F0.16 compounds, is 111.13 degrees. It is close to the ideal value of 109.47 degrees for the perfect FeAs tetrahedron, which is situated in the region of Fe-As-Fe bond angles where RFeAsO compounds tend to have the highest T-c. (C) 2011 American Institute of Physics. [doi:10.1063/1.3565408]
资助者	National Basic Research Program of China ; Ministry of Science and Technology of China ; National Natural Science Foundation of China
DOI	10.1063/1.3565408
收录类别	SCI
语种	英语
资助项目	National Basic Research Program of China[2010CB934603] ; Ministry of Science and Technology of China ; National Natural Science Foundation of China[50701045] ; National Natural Science Foundation of China[50831006]
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:000289952100340
出版者	AMER INST PHYSICS
引用统计	被引频次：4[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/321006/106304
专题	中国科学院金属研究所
通讯作者	Ren, W. J.
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yang, J. L.,Ren, W. J.,Li, D.,et al. Structural evolution of Ce1-xGdxFeAsO0.84F0.16 superconductors[J]. JOURNAL OF APPLIED PHYSICS,2011,109(7):3.
APA	Yang, J. L.,Ren, W. J.,Li, D.,&Zhang, Z. D..(2011).Structural evolution of Ce1-xGdxFeAsO0.84F0.16 superconductors.JOURNAL OF APPLIED PHYSICS,109(7),3.
MLA	Yang, J. L.,et al."Structural evolution of Ce1-xGdxFeAsO0.84F0.16 superconductors".JOURNAL OF APPLIED PHYSICS 109.7(2011):3.