中国物理B ›› 1994, Vol. 3 ›› Issue (9): 708-711.doi: 10.1088/1004-423X/3/9/009

• • 上一篇    

LOW-FIELD MICROWAVE SIGNAL IN UNDOPED AND Sb-DOPED Bi-Pb-Sr-Ca-Cu-O

许勤论1, 金通政2, 侯碧辉3, 王梅生3, 陈兆甲3   

  1. (1)Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China; (2)Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210008, China; (3)Laboratory of Structure Analysis, Department of Physics, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:1993-07-26 修回日期:1994-01-12 出版日期:1994-09-20 发布日期:1994-09-20
  • 基金资助:
    Project supported by the National Center for Research and Development on Superconductivity of China.

LOW-FIELD MICROWAVE SIGNAL IN UNDOPED AND Sb-DOPED Bi-Pb-Sr-Ca-Cu-O

HOU BI-HUI (侯碧辉)a, WANG MEI-SHENG (王梅生)a, CHEN ZHAO-JIA (陈兆甲)a, XU QIN-LUN (许勤论)b, JIN TONG-ZHENG (金通政)c   

  1. a Laboratory of Structure Analysis, Department of Physics, University of Science and Technology of China, Hefei 230026, China; b Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China;  c Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210008, China
  • Received:1993-07-26 Revised:1994-01-12 Online:1994-09-20 Published:1994-09-20
  • Supported by:
    Project supported by the National Center for Research and Development on Superconductivity of China.

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摘要： Non-resonant low-field microwave signal in undoped Bi-Pb-Sr-Ca-Cu-O (2223) sample inches monotonously with decreasing temperature, like that in many bulk samples of high-Tc superconductor. But the signed of a Sb-doped sample shows a peak at 103K, and declines gradually and tends to stabilize when the temperature is further reduced. A distorted 2223 phase (i.e., 130K phase) which was an intergrowth of 2223 and insulating monoclinic phases in the Sb-doped sample, was unstable, and it might change into the stable insulating monoclinic phase and lost its superconductivity at lower temperatures.

Abstract: Non-resonant low-field microwave signal in undoped Bi-Pb-Sr-Ca-Cu-O (2223) sample inches monotonously with decreasing temperature, like that in many bulk samples of high-Tc superconductor. But the signed of a Sb-doped sample shows a peak at 103K, and declines gradually and tends to stabilize when the temperature is further reduced. A distorted 2223 phase (i.e., 130K phase) which was an intergrowth of 2223 and insulating monoclinic phases in the Sb-doped sample, was unstable, and it might change into the stable insulating monoclinic phase and lost its superconductivity at lower temperatures.

中图分类号: 

  • 74.25.Nf