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Acta Physica Sinica (Overseas Edition), 1994, Vol. 3(9): 708-711    DOI: 10.1088/1004-423X/3/9/009
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev  

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
a Laboratory of Structure Analysis, Department of Physics, University of Science and Technology of China, Hefei 230026, China; 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
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.
Received:  26 July 1993      Revised:  12 January 1994      Accepted manuscript online: 
PACS:  74.25.Nf  
  74.72.Hs  
Fund: Project supported by the National Center for Research and Development on Superconductivity of China.

Cite this article: 

HOU BI-HUI (侯碧辉), WANG MEI-SHENG (王梅生), CHEN ZHAO-JIA (陈兆甲), XU QIN-LUN (许勤论), JIN TONG-ZHENG (金通政) LOW-FIELD MICROWAVE SIGNAL IN UNDOPED AND Sb-DOPED Bi-Pb-Sr-Ca-Cu-O 1994 Acta Physica Sinica (Overseas Edition) 3 708

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