中国物理B ›› 1999, Vol. 8 ›› Issue (11): 860-868.doi: 10.1088/1004-423X/8/11/010

• • 上一篇    

NON-EQUILIBRIUM MICROWAVE RESPONSE OF Yba2Cu3O7-δ GRANULAR THIN FILMS UNDER MAGNETIC FIELDS

ABBAS A.ESSA, 徐克西, 周世平, 鲍家善   

  1. Physics Department, Shanghai University, Shanghai 201800, China
  • 收稿日期:1999-03-22 修回日期:1999-06-15 出版日期:1999-11-15 发布日期:2005-06-29
  • 基金资助:
    Project supported by the Nature Science Foundation of Shanghai Education Committee, China (Grant No. 97AJ08).

NON-EQUILIBRIUM MICROWAVE RESPONSE OF Yba2Cu3O7-$\delta$ GRANULAR THIN FILMS UNDER MAGNETIC FIELDS

ABBAS A.ESSA, XU KE-XI (徐克西), ZHOU SHI-PING (周世平), BAO JIA-SHAN (鲍家善)   

  1. Physics Department, Shanghai University, Shanghai 201800, China
  • Received:1999-03-22 Revised:1999-06-15 Online:1999-11-15 Published:2005-06-29
  • Supported by:
    Project supported by the Nature Science Foundation of Shanghai Education Committee, China (Grant No. 97AJ08).

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摘要： Microwave responses of YBa2Cu3O7-δ(YBCO) granular film have been studied at the microwave frequency of 30.5 GHz. In the absence of a magnetic field the dependence of a normal microwave response on the bias current is observed at a temperature close to Tc. When a magnetic field ranged from 5.0 mT to 33.0 mT is applied, the responses broaden and shift toward a lower temperature. In the superconducting state, the responses were found to be highly dependent on the magnetic field. For the current equal to 5.0mA and a magnetic field above 17.0mT the response increases and did not vanish even at a very low temperature, the fact is believed to be correlated to the anisotropic character of the structure.

Abstract: Microwave responses of YBa2Cu3O7-$\delta$(YBCO) granular film have been studied at the microwave frequency of 30.5 GHz. In the absence of a magnetic field the dependence of a normal microwave response on the bias current is observed at a temperature close to Tc. When a magnetic field ranged from 5.0 mT to 33.0 mT is applied, the responses broaden and shift toward a lower temperature. In the superconducting state, the responses were found to be highly dependent on the magnetic field. For the current equal to 5.0mA and a magnetic field above 17.0mT the response increases and did not vanish even at a very low temperature, the fact is believed to be correlated to the anisotropic character of the structure.

中图分类号: 

  • 74.78.Bz
74.81.Bd (Granular, melt-textured, amorphous, and composite superconductors)