The Critical Magnetic Field of Anisotropic Two-Band Magnetic Superconductors

Abstract

The upper and lower critical field, and the critical field ratio of an anisotropic two-band magnetic superconductors in Ginzburg-Landau(GL) scenery is derived analytically. The temperature-dependent on the upper critical field is investigated and applied to Fe-based superconductors. We find that the very high value of zero-temperature upper critical field in Fe-based superconductors can be found in the negative differential susceptibility region. The temperature-dependent upper critical field is presented in two formulas as in the empirical view and in the GL two-band view that agrees with the experiment results.

14 pages, 3 figures,accepted by Solid state communication

References in corpus (9)

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• Broken time-reversal symmetry in superconducting Pr${}_{1-x}$La${}_x$Pt${}_4$Ge${}_{12}$
• Ginzburg-Landau analysis of the critical temperature and the upper critical field for three-band superconductors
• Possible multiband superconductivity in the quaternary carbide YRe2SiC
• The study on penetration depth of anisotropic two-band s-wave superconductors by Ginzburg-Landau approach