Magnetic response of hard type-II superconductors with a semicircular indentation

The magnetic response of superconductors with a semicircular indentation in parallel field is studied. The indentation is placed in a long superconductor wedge. The Meissner and vortex fields are calculated for any indentation radius in the London background. This allowed us to obtain the energy and the forces acting on a vortex in a given position inside the superconductor. The entrance magnetic field dependence on the indentation radius is calculated and compared with the entrance field for an indentation free semi-infinite superconductor. The role of the indentation on the surface barrier and on the vortex dynamics is also discussed