THE THIRD CRITICAL FIELD (HC3) OF SINGLE-CRYSTALLINE K0.73Fe1.68Se2 BY GINZBURG-LANDAU APPROACH

Arpapong Changjan; Atirat Maksuwan; Phanuchai Pramuanl; Sumitta Meakniti; Pongkaew Udomsamuthirun

doi:10.55766/sujst-2023-02-e01605

Authors

Arpapong Changjan Pathumwan Institute of Technology
Atirat Maksuwan Pathumwan Institute of Technology
Phanuchai Pramuanl Pathumwan Institute of Technology
Sumitta Meakniti Srinakharinwirot University
Pongkaew Udomsamuthirun Srinakharinwirot University

DOI:

https://doi.org/10.55766/sujst-2023-02-e01605

Keywords:

Ginzburg-Landau theory, Magnetic Superconductors, Surface critical magnetic field (Hc3)

Abstract

In this paper, two-band Ginzburg-Landau (GL) equations for magnetic superconductors were solved analytically to determine the temperature dependence of surface critical magnetic field (H_c3). By variation method analytically from 1^st GL equations and modified to the Changjan & Udomsamuthirun’s temperature dependence model. We found that, our model could find a good agreement with the experimental data of single-crystalline K_0.73Fe_1.68Se₂ superconductors vicinity the critical temperature scenery and the ratio H_c3/H_c2 (where H_c2 is the upper critical field of single-crystalline K_0.73Fe_1.68Se₂) indicated powerful temperature dependence.

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