Temperature dependence of some superconducting state parameters of a bulk MgB2 in two-band Ginzburg-Landau theory

Askerzade İ.

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, vol.390, no.4, pp.281-285, 2003 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 390 Issue: 4
  • Publication Date: 2003
  • Doi Number: 10.1016/s0921-4534(03)01090-6
  • Journal Name: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.281-285
  • Keywords: magnesium diboride, two-band superconductivity, Ginzburg-Landau theory, FIELD, HEAT
  • Ankara University Affiliated: Yes

Abstract

Temperature dependences of the coherent length xi(T), London penetration depth lambda(T), critical velocity of Cooper pair v(c)(T), critical current density j(c)(T) and Ginzburg-Landau (GL) parameter kappa(T) = lambda(T)/xi(T) for the bulk superconducting magnesium diboride, MgB2, are studied in the vicinity of T-c by using a two-band GL theory. The results of the calculations are in good agreement with experimental data for bulk MgB2. Comparison of obtained results with single-band GL theory are presented. (C) 2003 Elsevier Science B.V. All rights reserved.