Thermally excited spin current and giant magnetothermopower in metals with embedded ferromagnetic nanoclusters

Oleksandr Tsyplyatyev, Oleksiy Kashuba, Vladimir I. Fal'ko

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    Abstract

    We show that a thermally excited spin current naturally appears in metals with embedded ferromagnetic nanoclusters. When such materials are subjected to a magnetic field, a spin current can be generated by a temperature gradient across the sample as a signature of electron-hole symmetry breaking in a metal due to the electron spin-flip scattering from polarized magnetic moments. Such a spin current can be observed via a giant magnetothermopower which tracks the polarization state of the magnetic subsystem and is proportional to the magnetoresistance. Our theory explains the recent experiment on Co clusters in copper by S. Serrano-Guisan [Nat. Mater.5, 730 (2006)].

    Original languageEnglish
    Article number132403
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume74
    Issue number13
    DOIs
    Publication statusPublished - 2006

    Research Beacons, Institutes and Platforms

    • National Graphene Institute

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