Origin of the spin-asymmetry of hot-electron transmission in Fe

T. Banerjee, J.C. Lodder, R. Jansen

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    Using the technique of ballistic electron magnetic microscopy, we have studied the spin-asymmetry of transmission of hot electrons in Fe, for which a recent ab initio calculation has shown that the inelastic lifetime is similar for majority and minority spin. Nevertheless, using a spin-valve structure of Ni81Fe19/Au/ Fe, we find that the attenuation length of hot electrons in Fe at 1.2–1.6 eV is a factor of 4 larger for the majority spin. We argue that this large spin-asymmetry arises from the spin dependence of the group velocity, rather than the lifetime.
    Original languageUndefined
    Article number10.1103/PhysRevB.76.140407
    Pages (from-to)140407
    Number of pages4
    JournalPhysical review B: Condensed matter and materials physics
    Issue number5/october
    Publication statusPublished - 24 Oct 2007


    • EWI-12085
    • IR-62207
    • METIS-247017

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