Ca、Ce掺杂对Y_1Ba_2Cu_3O_(7-δ)的超导电性及其晶格结构的影响  

EFFECT OF Ca AND Ce DOPING ON SUPERCONDUCTING PROPERTIES AND STRUCTURE OF Y_1Ba_2Cu_3O_(7-δ)

作　　者：鲁彦忠[1,2] 孙爱民[1,2] 刘恒伟[1,2] 马耀通[1,2] 马金元[3] 艾小倩[1,2] 胡婧婧[1] 张永福[1,2] 孙丽娜[1] 周敏[1] 赵懂叶[1,2] 

机构地区：[1]西北师范大学物理与电子工程学院,兰州730070 [2]甘肃省原子分子物理与功能材料重点实验室,兰州730070 [3]兰州理工大学理学院,兰州730050

出　　处：《低温物理学报》2012年第1期58-62,共5页Low Temperature Physical Letters

基　　金：甘肃省高等学校基本科研业务费项目(批准号:2009~2012)资助的课题~~

摘　　要：本文采用柠檬酸热分解法成功制备出了Y1-xCax(Ba1-xCex)2Cu3O7-δ(x=0、0.03、0.05、0.07、0.09)的一系列样品.我们采用标准的四端引线法对系列样品的超导电性进行了测量,测量结果表明:随着掺杂量x的不断增加,Y123的起始转变温度Tonset和临界转变温度Tc都在逐渐降低.利用X射线衍射仪对系列样品的晶格结构进行了表征分析,测量结果充分验证了上述结论,同时我们也简单阐述了Y123的晶格结构是如何影响其超导电性的.A series of Y1-xCk（Ba1-xCex）2Cu3O7-δ（x=O、0.03、0.05、0.07、0.09） prepared using the method of thermal decomposition of citric samples were successfully acid. The samples of superconductivity were measured using normal four terminals method. Measurement results show that the onset temperature Tonset and the critical temperature Tc of Y123 all gradually reduced with the increasing of doping concentration x. The samples of lattice structure were characterized using the X-ray diffraction. Measurement results verify the conclusions fully. At the same time, we described simply that how the change of Y123 lattice structure affects their superconductivity.

关 键 词：YBCO 超导电性 掺杂 

分 类 号：O511[理学—低温物理]