Systematic study on crystal structure and properties of FeSr(2)LnCu(2)O(7+delta) (Ln = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, and Yb)
文献类型：期刊论文
| 作者 | L. T. Yang ; J. K. Liang ; Q. L. Liu ; H. M. Fan ; G. B. Song ; X. M. Feng ; H. F. Yang ; G. H. Rao |
| 刊名 | Chemistry of Materials
 |
| 出版日期 | 2003 |
| 卷号 | 15期号:26页码:4987-4995 |
| 关键词 | ferromagnetic superconductor rusr2gdcu2o8 neutron-diffraction dc magnetization mossbauer sites |
| ISSN号 | 0897-4756 |
| 中文摘要 | The crystal structures of a series of new compounds with the composition FeSr(2)LnCu(2)O(7+delta) (Ln = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, and Yb) that were successfully synthesized by solid-state reaction are investigated. The Rietveld refinement of the X-ray diffraction data shows that the samples exhibit a transition from a tetragonal system with space group P4/mmm for light rare earths Ln = La, Nd, Sm, Eu, and Gd to an orthorhombic system with space group Pmmm for heavy rare earths Ln = Dy, Ho, Er, and Yb. The oxygen contents of the samples are chemically determined by the iodometric titration. The room-temperature Mossbauer spectroscopy of (57)Fe in FeSr(2)GdCu(2)O(7+delta) is used to study the site distribution of Fe between the 1a and 2g sites in the as-synthesized in the air samples and O(2)-annealed samples, respectively. In the as-synthesized sample, there are about 67% of Fe ions residing in the la site, whereas in the 02-annealed sample, there are about 61% of Fe ions residing on the la site. Magnetization measurements indicate that Z changes with temperature in a Curie-type manner. Resistance measurements indicate that these samples have a semiconductor-like behavior and their band gap is related to their structural type and the radius of rare earth ions. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/36113]  |
| 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 | L. T. Yang,J. K. Liang,Q. L. Liu,et al. Systematic study on crystal structure and properties of FeSr(2)LnCu(2)O(7+delta) (Ln = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, and Yb)[J]. Chemistry of Materials,2003,15(26):4987-4995. |
| APA | L. T. Yang.,J. K. Liang.,Q. L. Liu.,H. M. Fan.,G. B. Song.,...&G. H. Rao.(2003).Systematic study on crystal structure and properties of FeSr(2)LnCu(2)O(7+delta) (Ln = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, and Yb).Chemistry of Materials,15(26),4987-4995. |
| MLA | L. T. Yang,et al."Systematic study on crystal structure and properties of FeSr(2)LnCu(2)O(7+delta) (Ln = La, Nd, Sm, Eu, Gd, Dy, Ho, Er, and Yb)".Chemistry of Materials 15.26(2003):4987-4995. |
入库方式： OAI收割
来源：金属研究所
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