Flux Penetration and Expulsion in Thin Superconducting Disks
Flux Penetration and Expulsion in Thin Superconducting Disks
Using an expansion of the order parameter over the eigenfunctions of the linearized first Ginzburg-Landau (GL) equation, we obtain numerically the saddle points of the free energy separating the stable states with different number of vortices. In contrast to known surface and geometrical barrier models, we find that in a …