| Structural evolution of Ce(1-x)Gd(x)FeAsO(0.84)F(0.16) superconductors | |
| J. L. Yang; W. J. Ren; D. Li; Z. D. Zhang | |
| 2011 | |
| Source Publication | Journal of Applied Physics
 |
| ISSN | 0021-8979 |
| Volume | 109Issue:7 |
| Abstract | 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] |
| description.department | [ren, w. j.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;ren, wj (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;wjren@imr.ac.cn |
| Keyword | Layered Quaternary Compound High-temperature Superconductivity |
| URL | 查看原文 |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/30822 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation 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). |
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