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

研究成果: ジャーナルへの寄稿記事

13 引用 (Scopus)


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.

ジャーナルPhysica C: Superconductivity and its applications
出版物ステータス出版済み - 6 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