We fabricated nanoscale ferromagnetic (F) Nickel/superconducting (S) indium junctions which show that spin polarization effects on the contact conductance can be observed in a planar geometry. The data demonstrate that the Andreev–Saint-James [Sov. Phys. JETP19, 1228 (1964) and J. Phys. (Paris)25, 899 (1964)] electron-hole reflections at the FS interface, which are sensitive to the polarization of the F side, dominate the conductance of the contact at low bias. The simplicity of fabrication makes these junctions appealing for use in multiterminal SF structures.

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