中国物理B ›› 1996, Vol. 5 ›› Issue (4): 295-299.doi: 10.1088/1004-423X/5/4/006

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BROADENING OF RESISTIVE TRANSITION AND IRREVERSIBILITY LINE FOR EPITAXIAL

许小军1, 方军1, 王智河1, 曹效文1, 李可斌2   

  1. (1)Institute of Plasma Physics, Academia Sinica, Hefei 230031, China; (2)Institute of Solid State Physics, Academia Sinica, Hefei 230031, China
  • 收稿日期:1995-02-07 出版日期:1996-04-20 发布日期:1996-04-20
  • 基金资助:
    Project supported by the National Center for Research and Development for Superconductivity of China under No.J-A-5226.

BROADENING OF RESISTIVE TRANSITION AND IRREVERSIBILITY LINE FOR EPITAXIAL YBa2Cu3O7-$\delta$ THIN FILM

XU XIAO-JUN (许小军)a, LI KE-BIN (李可斌)b, FANG JUN (方军)a, WANG ZHI-HE (王智河)a, CAO XIAO-WEN (曹效文)a   

  1. a Institute of Plasma Physics, Academia Sinica, Hefei 230031, China; b Institute of Solid State Physics, Academia Sinica, Hefei 230031, China
  • Received:1995-02-07 Online:1996-04-20 Published:1996-04-20
  • Supported by:
    Project supported by the National Center for Research and Development for Superconductivity of China under No.J-A-5226.

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摘要： The broadening of resistive transition of c axis oriented epitaxial YBCO thin film has been measured for three configurations: (1) H∥c and H⊥I; (2) H∥ab plane and H⊥I; (3) H∥ab plane and H∥I in magnetic field up to 8 Teala(T), and for different angle θ of magnetic field relative to the ab plane with H = 4T. The results obtained indicate that the broadening of resistive transition is mainly determined by the angle θ, but is hardly related to the angle α made between magnetic field and tran sport current in ab plane. This means that the broadening of resistive transition is not determined by flux motion drived by apparent Lorentz force. Au expression of angular dependence of irreveraibility line has been given.

Abstract: The broadening of resistive transition of c axis oriented epitaxial YBCO thin film has been measured for three configurations: (1) H∥c and H⊥I; (2) H∥ab plane and H⊥I; (3) H∥ab plane and H∥I in magnetic field up to 8 Teala(T), and for different angle $\theta$ of magnetic field relative to the ab plane with H = 4T. The results obtained indicate that the broadening of resistive transition is mainly determined by the angle $\theta$, but is hardly related to the angle $\alpha$ made between magnetic field and tran sport current in ab plane. This means that the broadening of resistive transition is not determined by flux motion drived by apparent Lorentz force. Au expression of angular dependence of irreveraibility line has been given.

中图分类号: 

  • 74.78.Bz
74.25.Op (Mixed states, critical fields, and surface sheaths)