Surface critical magnetic field 𝐻c3(𝑇) of a bulk superconductor MgB2 using two-band Ginzburg–Landau theory

Pramana

I N Askerzade1 2¹ 

[1] Institute of Physics, Azerbaijan National Academy of Sciences, H. Cavid 33, Baku, 370143 Azerbaijan$$

关键词: Magnesium diboride;    two-band superconductivity;    Ginzburg–Landau theory;    surface superconductivity.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Two-band Ginzburg–Landau (TB G–L) equations for a bulk MgB2 were solved analytically to determine the temperature dependence of surface critical magnetic field Hc3(𝑇). It is shown that 𝐻c3(𝑇) has the same temperature dependence with 𝐻c2(𝑇), similar to the case of a single-band superconductor, 𝐻c3(𝑇)=1.66 𝐻c2(𝑇). We use an elimination procedure for the decoupling of G–L equations of two-band superconductivity, which eases the calculations. It is expected that the temperature dependence for 𝐻c3(𝑇) gives positive curvature near 𝑇c.

【 授权许可】

Unknown