Critical fields for vortex expulsion from narrow superconducting strips
Critical fields for vortex expulsion from narrow superconducting strips
We calculate the critical magnetic fields for vortex expulsion for an infinitely long superconducting strip, using the Ginzburg-Landau formalism. Two critical fields can be defined associated with the disappearance of either the energetic stability or metastability of vortices in the center of the strip for decreasing magnetic fields. We compare …