Abstract:
A ferromagnet (F)-superconductor (S) (F$_1$F$_2$S) three-layer heterostructure has been studied using Usadel equations with allowance for the pair electron-electron interaction in ferromagnetic layers. The appearance of regions with solitary superconductivity on the phase diagram has been predicted for the antiparallel configuration of the magnetization in F layers. Conditions for the possible experimental observation of solitary superconductivity in FFS three-layer structures, as well as for the detection of the electron-electron interaction in ferromagnets, have been discussed.
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