Nonlinear temperature dependence of magnetization of two-band superconductors near upper critical field

Askerzade İ.

COMMUNICATIONS IN THEORETICAL PHYSICS, cilt.48, sa.5, ss.949-952, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 48 Sayı: 5
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1088/0253-6102/48/5/038
  • Dergi Adı: COMMUNICATIONS IN THEORETICAL PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.949-952
  • Anahtar Kelimeler: two-band superconductivity, Ginzburg-Landau theory, magnetization, YNI2B2C, MGB2
  • Ankara Üniversitesi Adresli: Evet

Özet

Temperature dependence of the magnetization M(T) of two-band superconductors is studied in the vicinity of upper critical field H-c2 by using a two-band Ginzburg-Landau (GL) theory. It is shown that magnetization M(T) has a nonlinear character due to positive curvature of upper critical field H-c2(T) and temperature dependence of effective Ginzburg Landau parameter x(eff)(T). The results are shown to be in qualitative agreement with experimental data for the superconducting magnesium diboride, MgB2.