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

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

Research output: Contribution to journalArticle

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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

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Critical current density (superconductivity)
Superconducting materials
critical current
hooks
Crystal structure
Single crystals
Magnetic fields
current density
Fluxes
Crystals
single crystals
magnetic fields
softening
flux density
crystal structure
crystals

All Science Journal Classification (ASJC) codes

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

Cite this

On the magnetic field dependence of critical current density in single crystals of high-Tc superconductors. / Yamafuji, K.; Fujiyoshi, T.; Toko, Kiyoshi; Matsuno, T.; Kobayashi, T.; Kishio, K.

In: Physica C: Superconductivity and its applications, Vol. 226, No. 1-2, 01.06.1994, p. 133-142.

Research output: Contribution to journalArticle

Yamafuji, K. ; Fujiyoshi, T. ; Toko, Kiyoshi ; Matsuno, T. ; Kobayashi, T. ; Kishio, K. / On the magnetic field dependence of critical current density in single crystals of high-Tc superconductors. In: Physica C: Superconductivity and its applications. 1994 ; Vol. 226, No. 1-2. pp. 133-142.
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