Structural refinement of RE(2)ACu(2)O(6) from powder X-ray diffraction data (RE = La, Nd, A = Sr, Ca)
文献类型：期刊论文
| 作者 | Deng, H ; Dong, C ; Chen, H ; Wu, F ; Jia, SL ; Shen, JC ; Zhao, ZX |
| 刊名 | PHYSICA C
 |
| 出版日期 | 1999 |
| 卷号 | 313期号:3-4页码:285 |
| 关键词 | DEFECT PEROVSKITE LAYERS COPPER-OXIDES TRANSPORT-PROPERTIES MAGNETIC-PROPERTIES OXYGEN SUPERCONDUCTIVITY SYSTEM INTERGROWTHS CUPRATE EXCESS |
| ISSN号 | 0921-4534 |
| 通讯作者 | Deng, H (reprint author), Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | Crystal structures of La2SrCu2O6, Nd1.8Sr1.2Cu2O6, LaNdSrCu2O6 and La2CaCu2O6 are refined from powder X-ray diffraction data. The size effect plays a dominant role in controlling the distribution of the RE3+ and A(2+) ions in the lattices. Small ions Nd3+ and Ca2+ show strong preference for occupying the 2a site located between two CuO2 layers, while large ions Sr2+ and La3+ prefer the 4e site in rock salt layers. When RE3+ ions occupy the 2a site, extra oxygen may transfer to the 2b site at the apical position to keep the local charge equilibrium, and superconductivity of the compounds is deteriorated. Resistance data for samples annealed in nitrogen and oxygen atmosphere agree well with this structural model. These results indicate that La2CaCu2O6 is the best superconductor candidate among the 0212 compounds studied. (C) 1999 Elsevier Science B.V. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53348]  |
| 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 | Deng, H,Dong, C,Chen, H,et al. Structural refinement of RE(2)ACu(2)O(6) from powder X-ray diffraction data (RE = La, Nd, A = Sr, Ca)[J]. PHYSICA C,1999,313(3-4):285. |
| APA | Deng, H.,Dong, C.,Chen, H.,Wu, F.,Jia, SL.,...&Zhao, ZX.(1999).Structural refinement of RE(2)ACu(2)O(6) from powder X-ray diffraction data (RE = La, Nd, A = Sr, Ca).PHYSICA C,313(3-4),285. |
| MLA | Deng, H,et al."Structural refinement of RE(2)ACu(2)O(6) from powder X-ray diffraction data (RE = La, Nd, A = Sr, Ca)".PHYSICA C 313.3-4(1999):285. |
入库方式： OAI收割
来源：物理研究所
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