中国物理B ›› 1992, Vol. 1 ›› Issue (3): 219-223.doi: 10.1088/1004-423X/1/3/008

• • 上一篇    

POSITRON ANNIHILATION STUDY OF YBa2(Cu1-xSnx)3Oy SUPERCONDUCTORS

陈昂1, 智宇1, 李晓华2, 王少阶2, 李标荣3, 张绪礼3, 唐超群3   

  1. (1)Department of Physics, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China; (2)Department of Physics, Wuhan University, Wuhan 430071, China; (3)Department of Soild State Electronics, Department of Physics. Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:1991-11-15 出版日期:1992-03-20 发布日期:1992-03-20

POSITRON ANNIHILATION STUDY OF YBa2(Cu1-xSnx)3Oy SUPERCONDUCTORS

CHEN ANG (陈昂)a, ZHI YU (智宇)a, LI BIAO-RONG (李标荣)b, ZHANG XU-LI (张绪礼)b, TANG CHAO-QUN (唐超群)b, LI XIAO-HUA (李晓华)c, WANG SHAO-JIE (王少阶)c   

  1. a Department of Physics, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China; bDepartment of Soild State Electronics, Department of Physics. Huazhong University of Science and Technology, Wuhan 430074, China; c  Department of Physics, Wuhan University, Wuhan 430071, China
  • Received:1991-11-15 Online:1992-03-20 Published:1992-03-20

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摘要： The positron annihilation lifetime spectra and their temperature dependence for the YBa2Cu3Oy superconducting ceramics doped with Sn have been studied. The resutts of analyses indicate that the element Sn is substituted for Cu(1) sites, and this leads to the ordering of the oxygen atoms as well as the increase of local electronic density in the Cu(1)-O layer where Cu(1) is substituted by Sn.

Abstract: The positron annihilation lifetime spectra and their temperature dependence for the YBa2Cu3Oy superconducting ceramics doped with Sn have been studied. The resutts of analyses indicate that the element Sn is substituted for Cu(1) sites, and this leads to the ordering of the oxygen atoms as well as the increase of local electronic density in the Cu(1)-O layer where Cu(1) is substituted by Sn.

中图分类号:  (Electronic structure (photoemission, etc.))

  • 74.25.Jb
78.70.Bj (Positron annihilation)