Nonreciprocity in Yttrium-Iron Garnet–Superconductor Structures

This article presents the results of experimental studies of the effect of proximity of a ferromagnetic dielectric with in-plane magnetization (Y3Fe5O12) on the superconducting transition in planar hybrid Y3Fe5O12/Nb and Y3Fe5O12/Al structures. The temperature dependence of the superconductor resistance changes due to the proximity of the magnetic dielectric: the superconducting transition temperature is lowered, and the transition broadens. The dependence of these effects on the mutual orientation of current in the superconductor and in-plane magnetization in the dielectric is revealed. The role of spin–orbit interaction at the superconductor/magnetic dielectric interface and symmetry violation in the superconductor with one of its surfaces being in contact with the magnetic material (and the other being free) is discussed.