Kondo effect and impurity band conduction in Co:TiO2 magnetic semiconductor

R. Ramaneti, J.C. Lodder, R. Jansen

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    The nature of charge carriers and their interaction with local magnetic moments in an oxide magnetic semiconductor is established. For cobalt-doped anatase TiO2 films, we demonstrate conduction in a metallic donor-impurity band. Moreover, we observe a clear signature of the Kondo effect in electrical transport data with remarkably high Kondo temperatures of up to 120 K. This indicates a strong coupling between local Co moments and delocalized electrons in the impurity band.
    Original languageUndefined
    Pages (from-to)195207-195207
    Number of pages5
    JournalPhysical review B: Condensed matter and materials physics
    Issue number5
    Publication statusPublished - 26 Nov 2007


    • IR-58272
    • EWI-12087
    • METIS-247019

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