Ferromagnet–superconductor hybrids

Abstract

A new class of phenomena discussed in this review is based on interaction\nbetween spatially separated, but closely located ferromagnets and\nsuperconductors. They are called Ferromagnet-Superconductor Hybrids (FSH).\nThese systems include coupled smooth and textured Ferromagnetic and\nSuperconducting films, magnetic dots, wires etc.The interaction may be provided\nby the magnetic flux from magnetic textures and supercurrents. The magnetic\nflux from magnetic textures or topological defects can pin vortices or create\nthem, changing drastically the properties of the superconductor. On the other\nhand, the magnetic field from supercurrents (vortices) strongly interacts with\nthe magnetic subsystem leading to formation of coupled magnetic-superconducting\ntopological defects. We discuss possible experimental realization of the FSH.\nThe presence of ferromagnetic layer can change dramatically the properties of\nthe superconducting film due to proximity effect. We discuss experimental and\ntheoretical studies of the proximity effect in the FSH including transition\ntemperature and order parameter oscillations and triplet superconductivity.\n