Spin filtering of hot holes in a metallic ferromagnet

T. Banerjee, E. Ul Haq, Martin Herman Siekman, J.C. Lodder, R. Jansen

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    Abstract

    Spin-dependent transport of nonequilibrium holes in ferromagnetic thin films and trilayers is investigated using ballistic hole magnetic microscopy. For Co, the hole attenuation length is short and increases from 6 to 10 A in the energy range 0.8 to 2 eV. The hole transmission of a Ni81Fe19/Au/Co trilayer is clearly spin dependent, resulting in a surprisingly large current change by a factor of 2.3 in a magnetic field. The energy and spin dependence of the hole transmission cannot be explained by the phase space available for inelastic decay of the hot holes.
    Original languageUndefined
    Pages (from-to)027204
    Number of pages4
    JournalPhysical review letters
    Volume94
    Issue number027204
    DOIs
    Publication statusPublished - 2005

    Keywords

    • TSTNE-Probe-STM: Scanning Tunneling Microscope
    • EWI-5379
    • IR-48084
    • METIS-219248
    • SMI-NE: From 2006 in EWI-NE

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