Probing momentum distributions in magnetic tunnel junctions via hot-electron decay

R. Jansen, T. Banerjee, B.G. Park, J.C. Lodder

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    Abstract

    The tunnel momentum distribution in a magnetic tunnel junction is probed by analyzing the decayof the hot electrons in the Co metal anode after tunneling, using a three-terminal transistor structurein which the hot-electron attenuation is sensitive to the tunnel momentum distribution. Solid stateamorphous Al2O3 barriers and the vacuum barrier of a scanning tunneling microscope arecompared. For the former the attenuation length in nominally the same Co is strikingly larger factorof 2, implying a more isotropic tunnel momentum distribution for Al2O3 barriers.
    Original languageEnglish
    Pages (from-to)1-3
    Number of pages3
    JournalApplied physics letters
    Volume90
    Issue number19
    DOIs
    Publication statusPublished - 8 May 2007

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