...hold121$B_c$$T$B_c（T）=B_0cdot（1-T^2T_c^2）Bc（T）=B0（1T2Tc2）pythonBc=B0*（1-（TTc）**2）#ifBcraiseValueError（Teeratureistoohighforsuperconductivity.）Jc=J0*（1-BBc）**nreturnJc...（BTJ0=1e10B0=12Tc=4n=1）n2n2210...2280100n0n001......3Nb-44TiNb-46.5TiNb-48TiNb-50TiNb-53TiNb-55Ti...NbTiHfZr11...