Synchrotron photoemission study of (Zn,Co)O films with uniform Co distribution

E. Guziewicz, M. I. Lukasiewicz, L. Wachnicki, K. Kopalko, András Kovács, Rafal E. Dunin-Borkowski, B. S. Witkowski, B. J. Kowalski, J. Sadowski, M. Sawicki, R. Jakiela, M. Godlewski

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    We present results of a resonant photoemission study of (Zn,Co)O films with Co content between 2% and 7%. The films were grown by Atomic Layer Deposition (ALD) at low temperature of 160°C, and show fully paramagnetic behavior. The Co ions are uniformly distributed in the ZnO matrix and are free of foreign phases and metal accumulations as indicated by TEM data. The electronic structure of (Zn,Co)O films was studied by Resonant Photoemission Spectroscopy across the Co3p–Co3d photoionization threshold. We have observed that the resonant enhancement of the photoemission intensity from the Co3d shell is not the same for samples with different cobalt content. We suggest that the Co3d contribution to the valence band depends on both Co and H content.
    Original languageEnglish
    JournalRadiation Physics and Chemistry
    Volume80
    Issue number10
    Pages (from-to)1046-1050
    ISSN0969-806X
    DOIs
    Publication statusPublished - 2011
    EventInternational School and Symposium on Synchrotron Radiation in Natural Science : Synchrotron radiation studies in Poland - Szklarska Poręba, Poland
    Duration: 1 Jan 2011 → …
    Conference number: 10

    Conference

    ConferenceInternational School and Symposium on Synchrotron Radiation in Natural Science : Synchrotron radiation studies in Poland
    Number10
    CitySzklarska Poręba, Poland
    Period01/01/2011 → …

    Keywords

    • Atomic layer deposition
    • Diluted magnetic semiconductors
    • Electronic structure
    • Resonant photoemission spectroscopy

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