On the Ginsburg-Landau analysis of the upper critical field H-c2 in MgB2
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, cilt.15, sa.2, 2002 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 15 Sayı: 2
- Basım Tarihi: 2002
- Doi Numarası: 10.1088/0953-2048/15/2/102
- Dergi Adı: SUPERCONDUCTOR SCIENCE & TECHNOLOGY
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Ankara Üniversitesi Adresli: Evet
Özet
We study the temperature dependence of the upper critical field H-c2(T) for superconducting magnesium diboride, MgB2 in the vicinity of T-c using a two-band Ginzburg-Landau (G-L) theory. The temperature dependence of H-c2(T) near T-c exhibits a positive curvature. In addition, the calculated temperature dependence and its higher-order derivatives are also shown to be in good agreement with the experimental data. In analogy with the multi-band character of the Eliashberg microscopic theory, the positive curvature of H-c2(T) is described reasonably by solving the two-band G-L theory.