Andreev reflections and magnetoresistance in ferromagnet-superconductor mesoscopic structures

V. I. Fal'ko, C. J. Lambert, A. F. Volkov

    Research output: Contribution to journalArticlepeer-review

    Abstract

    An analysis is made of the change in the resistance of a nanostructure consisting of a diffusive ferromagnetic (F) wire and normal metal electrodes, due to the onset of superconductivity (S) in the normal electrode and Andreev scattering processes. The superconducting transition results in an additional contact resistance arising from the necessity to match the spin-polarized current in the F-wire to the spinless current in the S reservoir, which is comparable to the resistance of a piece of F wire with length equal to the spin relaxation length. It is also shown that in the absence of spin relaxation the resistance of a two-domain structure is the same for a ferro-or antiferromagnetic configuration if one electrode is in the superconducting state.

    Original languageEnglish
    Pages (from-to)532-538
    Number of pages7
    JournalJETP Letters
    Volume69
    Issue number7
    Publication statusPublished - 10 Apr 1999

    Research Beacons, Institutes and Platforms

    • National Graphene Institute

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