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Search for ferromagnetism in undoped and cobalt-doped Hf O 2-δ
M.S.R. Rao, D.C. Kundaliya, S.B. Ogale, L.F. Fu, S.J. Welz, N.D. Browning, V. Zaitsev, B. Varughese, C.A. Cardoso, A. CurtinShow More
Published in
Volume: 88
Issue: 14
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. © 2006 American Institute of Physics.
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