Search for ferromagnetism in undoped and cobalt-doped Hf O 2-δ

M. S.Ramachandra Rao, Darshan C. Kundaliya, S. B. Ogale, L. F. Fu, S. J. Welz, N. D. Browning, V. Zaitsev, B. Varughese, C. A. Cardoso, A. Curtin, S. Dhar, S. R. Shinde, T. Venkatesan, S. E. Lofland, S. A. Schwarz

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    37 Scopus citations

    Abstract

    We report on the search for ferromagnetism in undoped and cobalt-doped high- k dielectric Hf O2 films. Over a broad range of growth conditions, we do not observe ferromagnetism in undoped Hf O2 films. On the other hand, we do observe room temperature ferromagnetism in dilutely Co-doped Hf O2 films, but the origin of the same appears extrinsic (a Co rich surface layer) at least for the regime of growth conditions explored.

    Original languageEnglish (US)
    Article number142505
    JournalApplied Physics Letters
    Volume88
    Issue number14
    DOIs
    StatePublished - Apr 3 2006

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy (miscellaneous)

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