A theoretical analysis is presented for the critical state of an infinitely long type-II superconducting strip characterized by an arbitrary critical current density ${\mathit{J}}_{\mathit{c}}$(B). An analytical framework is developed, and numerical solutions are presented for the quasistatic current-density and flux-density profiles, as well as the hysteretic magnetization curves. The field dependence of the critical current density significantly affects the shape of the magnetization curves.

• Received 10 October 1995

DOI:https://doi.org/10.1103/PhysRevB.53.8643