NONVOLATILE SUPERCONDUCTING VALVE ON THE BASE OF FERROMAGNET/SUPERCONDUCTOR NANOSTRUCTURE

摘要

We report results of transport measurements on patterned Nb/PdNi bilayers. The critical current is shown to depend on the magnetic prehistory. After application of the strong perpendicular magnetic field the critical current becomes significantly less than for virgin sample. Application of the parallel magnetic field influences less the absolute value of the critical current. The observed behavior can be accounted for by the magnetocrystalline anisotropy of thin PdNi layer oriented out-of-plane, generating the spontaneous vortex phase inside the superconducting layer.