中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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.

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来源:物理研究所

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