Structural evolution of Ce(1-x)Gd(x)FeAsO(0.84)F(0.16) superconductors
文献类型：期刊论文
| 作者 | J. L. Yang ; W. J. Ren ; D. Li ; Z. D. Zhang |
| 刊名 | Journal of Applied Physics
 |
| 出版日期 | 2011 |
| 卷号 | 109期号:7 |
| 关键词 | layered quaternary compound high-temperature superconductivity |
| ISSN号 | 0021-8979 |
| 中文摘要 | Structural parameters have a critical impact on superconductivity in iron-based oxypnictide superconductors. Structural evolution study was performed on Ce(1-x)Gd(x)FeAsO(0.84)F(0.16) 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 Ce(0.6)Gd(0.4)FeAsO(0.84)F(0.16), with the highest T(c) among Ce(1-x)Gd(x)FeAsO(0.84)F(0.16) 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] |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30822]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | J. L. Yang,W. J. Ren,D. Li,et al. Structural evolution of Ce(1-x)Gd(x)FeAsO(0.84)F(0.16) superconductors[J]. Journal of Applied Physics,2011,109(7). |
| APA | J. L. Yang,W. J. Ren,D. Li,&Z. D. Zhang.(2011).Structural evolution of Ce(1-x)Gd(x)FeAsO(0.84)F(0.16) superconductors.Journal of Applied Physics,109(7). |
| MLA | J. L. Yang,et al."Structural evolution of Ce(1-x)Gd(x)FeAsO(0.84)F(0.16) superconductors".Journal of Applied Physics 109.7(2011). |
入库方式： OAI收割
来源：金属研究所
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