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Effects of Non-Linearity in the Variation of Pinning Potential with Current-Density on Magnetic Flux Creep in High and Low Tc Superconductors

  • D. O. Welch
  • M. Suenaga
  • Youwen Xu
  • A. R. Ghosh

Abstract

A theoretical analysis is presented of the effects on magnetic flux creep of non-linearity in the relation between the activation energy required for the depinning of magnetic flux and the current density. The non-linearity results in an apparent temperature dependence of the depinning energy as deduced by the conventional methods of analysis of flux-creep data. The discussion is illustrated with data for YBa2Cu3O7 and Nb3Sn.

Keywords

Flux Line Squid Magnetometer Flux Creep Ture Superconductor Complica Tions 
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References

  1. 1.
    M. R. Beasley, R. Labusch, and W. W. Webb, Phys. Rev. 181, 682 (1969).ADSCrossRefGoogle Scholar
  2. 2.
    Youwen Xu, M. Suenaga, A. R. Moodenbaugh, and D. O. Welch, Phys. Rev. B (to appear 1 Dec. 1989 ).Google Scholar
  3. 3.
    C. W. Hagen, R. Griessen, and E. Salomons, Physica C 157, 199 (1989).ADSCrossRefGoogle Scholar
  4. 4.
    The melt-textured YBa2Cu3Oy-x was kindly supplied to us by M. Murakami of Nippon Steel.Google Scholar
  5. 5.
    C. W. Hagen and R. Griessen, in High-Temperature Superconductors, A. V. Narlikar, editor, Nova Sci. Publ. Inc., New York, 1989.Google Scholar

Copyright information

© Springer Japan 1990

Authors and Affiliations

  • D. O. Welch
    • 1
  • M. Suenaga
    • 1
  • Youwen Xu
    • 1
  • A. R. Ghosh
    • 1
  1. 1.Materials Science DivisionBrookhaven National LaboratoryUptonUSA

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