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Andreev Reflection in Ferromagnet-Superconductor Junctions
The transport properties of a ferromagnet-superconductor (FS) junction are studied in a scattering formulation. Andreev reflection at the FS interface is strongly affected by the exchange interaction in the ferromagnet. The conductance ${G}_{\mathrm{FS}}$ of a ballistic point contact between F and S can be either larger or smaller than the …