On the magnetic field dependence of critical current density in single crystals of high-Tc superconductors

K. Yamafuji, T. Fujiyoshi, K. Toko, T. Matsuno, T. Kobayashi, K. Kishio

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14 Citations (Scopus)

Abstract

The critical current density, Jc, is discussed theoretically to explain the exponential dependence of Jc on the flux density, B, given typically by Jc∝exp( -B B0(T)), which has been widely observed for single crystals of high-Tc superconductors in an external magnetic field parallel to the crystal c-axis. It is pointed out that Jc shows an exponential-type dependence, Jc∝exp(-f{hook}f(B, T)), when the tilt modulus, C44, of fluxoids shows a remarkable softening for higher values of the wave number. It is also shown that the present expression of Jc is reduced to the observed B dependence of f{hook}(B, T){reversed tilde equals} B B0(T) by taking account of th e effects of the layered crystal structure on C44 and the correlation length, l44.

Original languageEnglish
Pages (from-to)133-142
Number of pages10
JournalPhysica C: Superconductivity and its applications
Volume226
Issue number1-2
DOIs
Publication statusPublished - Jun 1 1994

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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