Surface critical magnetic field H-c3(T) of a bulk superconductor MgB2 using two-band Ginzburg-Landau theory

Askerzade İ.

PRAMANA-JOURNAL OF PHYSICS, cilt.61, sa.3, ss.611-616, 2003 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 61 Sayı: 3
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1007/bf02705483
  • Dergi Adı: PRAMANA-JOURNAL OF PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.611-616
  • Anahtar Kelimeler: magnesium diboride, two-band superconductivity, Ginzburg-Landau theory, surface superconductivity, HEAT
  • Ankara Üniversitesi Adresli: Evet

Özet

Two-band Ginzburg-Landau (TB G-L) equations for a bulk MgB2 were solved analytically to determine the temperature dependence of surface critical magnetic field H-c3(T). It is shown that H-c3(T) has the same temperature dependence with H-c2(T), similar to the case of a single-band superconductor, H-c3(T) = 1.66 H-c2(T). We use an elimination procedure for the decoupling of G-L equations of two-band superconductivity, which eases the calculations. It is expected that the temperature dependence for H-c3(T) gives positive curvature near T-c.