| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1593239 | Solid State Communications | 2011 | 5 Pages |
The upper and lower critical fields, and the critical field ratio of an anisotropic two-band magnetic superconductor in the Ginzburg–Landau (GL) scenario is derived analytically. The temperature-dependent upper critical field is investigated and applied to Fe-based superconductors. We find that a 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, in the empirical view and in the GL two-band view, which agrees with the experimental results.
► We derive the critical field of two-band magnetic superconductors analytically. ► Our equations are of simple form. ► The upper critical field is investigated and applied to Fe-based superconductors.
