The temperature dependent surface critical magnetic field (Hc3) of K0.73Fe1.68 Se2 superconductor by semi-anisotropic two band Ginzburg-Landau approach

Abstract

Abstract In this study, we used a two-band Ginzburg-Landau technique to investigate the surface critical magnetic field (Hc3 ) of magnetic superconductors, with the first band being an anisotropic superconductor and the second band being an isotropic superconductor. Following the calculation of the 1st Ginzburg-Landau equation, a surface critical magnetic field and its temperature dependent surface critical magnetic field were solved analytically using the variation method. Based on Changjan and Udomsamuthirun’s temperature dependency model, we discovered that fits best with experimental data of K0.73Fe1.68 Se2 superconductor, vicinity of the critical temperature.