Surface critical magnetic field H-c3(T) of a bulk superconductor MgB2 using two-band Ginzburg-Landau theory
PRAMANA-JOURNAL OF PHYSICS, cilt.61, sa.3, ss.611-616, 2003 (SCI-Expanded, Scopus)
- 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: Hayır
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.