Y_2Ba_1Cu_1O_(5-δ)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 Y_2Ba_1Cu_1O_(5-δ) 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] 张永福[1,2] 孙丽娜[1] 赵懂叶[1,2] 马书懿[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》2011年第6期450-453,共4页Low Temperature Physical Letters

基　　金：甘肃省高等学校基本科研业务费项目(2010年~2012年)资助的课题~~

摘　　要：本文采用固相反应法成功制备出一系列Y123与Y211的摩尔比为1∶x(x=0、0.14、0.27、0.3、0.35、0.4、0.45、0.47、0.5、0.8、1.18)的样品.实验结果表明:在0.35≤x≤0.5范围内,Y123的起始转变温度Tonset、临界转变温度Tc以及转变宽度△Tc都在x=0.47出现了拐点,这说明了x=0.47为最佳掺杂比例,本文同时也简单阐述了Y123的晶格结构是如何改变其超导电性的.A series of superconductor samples that the molar ratio of Y123 and Y211 is 1 ： x（x=0.0. 14.0. 27.0. 3. 0. 35.0.4.0.45.0. 47.0. 5.0. 8.1.18） were prepared by solid-state reaction method. The results show that the onset transition temperature Tonset, the critical transition temperature Tc and the transition width △Tc of Y123 appeared inflexion when x value is 0. 47 （0. 35≤x≤0. 5） . Therefore, it illustrates fully that 0. 47 is the best doping ration. At the same time, this paper also analyzes simply that how the change of Y123 lattice structure affects their superconductivity.

关 键 词：高温超导材料 掺杂 超导电性 

分 类 号：TM26[一般工业技术—材料科学与工程]