Critical fields for vortex expulsion from narrow superconducting strips

摘要: We calculate the critical magnetic fields for vortex expulsion an infinitely long superconducting strip using Ginzburg-Landau formalism. Two associated with disappearance of either energetic stability or metastability vortices in center decreasing can be defined. compare theoretical predictions London formalism ours and recently published experimental results. As expected, narrow strips, our results better reproduce findings.