Search for ferromagnetism in undoped and cobalt-doped HfO{sub 2-{delta}}

Journal Article · Mon Apr 03 00:00:00 EDT 2006 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2190909· OSTI ID:20779164

Ramachandra Rao, M S; Kundaliya, Darshan C; Ogale, S B; Fu, L F; Welz, S J; Browning, N D; Zaitsev, V; Varughese, B; Cardoso, C A; Curtin, A; Dhar, S; Shinde, S R; Venkatesan, T; Lofland, S E; Schwarz, S A ^[1]

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1. Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, Maryland 20742-4111 (United States)

We report on the search for ferromagnetism in undoped and cobalt-doped high-k dielectric HfO{sub 2} films. Over a broad range of growth conditions, we do not observe ferromagnetism in undoped HfO{sub 2} films. On the other hand, we do observe room temperature ferromagnetism in dilutely Co-doped HfO{sub 2} films, but the origin of the same appears extrinsic (a Co rich surface layer) at least for the regime of growth conditions explored.

• OSTI ID: 20779164
• Journal Information: Applied Physics Letters, Vol. 88, Issue 14; Other Information: DOI: 10.1063/1.2190909; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT
DIELECTRIC MATERIALS
DOPED MATERIALS
ENERGY LOSSES
FERROMAGNETIC MATERIALS
FERROMAGNETISM
HAFNIUM OXIDES
ION MICROPROBE ANALYSIS
MASS SPECTRA
MASS SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY PHOTOELECTRON SPECTROSCOPY