ANGULAR-DEPENDENCE OF THE CRITICAL CURRENTS IN MO77GE23/GE MULTILAYERS

We examine the critical current densities of superconducting/insulating Mo77Ge23/Ge multilayers in magnetic fields applied at arbitrary angles with respect to the superconducting layers. In these measurements, we demonstrate the existence of a threshold field, below which the critical current is governed only by the perpendicular component of the applied field. Also, we observe that there exists a critical angle that divides two different regimes of vortex pinning. Finally, we relate these results to existing theories of vortices in layered superconductors.