Without internal affiliation

  • Author: Glasscock, Julie

    Unknown

  • Author: Barnes, P.R.F.

    Commonwealth Scientific and Industrial Research Organisation

  • Author: Plumb, I.C.

    Commonwealth Scientific and Industrial Research Organisation

  • Author: Bendavid, A.

    Commonwealth Scientific and Industrial Research Organisation

  • Author: Martin, P.J.

    Commonwealth Scientific and Industrial Research Organisation

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Thin films of α-Fe2O3 (hematite) were deposited using filtered arc deposition. The structural, optical and electrical properties of the films have been characterized. High-purity hematite films were produced, free from other iron oxide phases and impurities. The films exhibit preferred orientation, with the c-axis of the hexagonal structure aligned perpendicular to the substrate. The films have an upper uncertainty bound of the porosity of 15%, with a microindentation hardness of 17.5±1 GPa and elastic modulus of 1235±5 GPa. The indirect and direct band gap energies were found to be approximately 1.9 eV and 2.7 eV, respectively. The refractive index, and the extinction and absorption coefficients were determined from total reflectance and direct transmittance measurements. The thin films exhibit a high resistivity (≥105 Ω cm) which indicates pure α-Fe2O3. An activation energy of 0.7 eV was calculated from an Arrhenius plot of the conductivity.
Original languageEnglish
JournalThin Solid Films
Publication date2008
Volume516
Issue8
Pages1716-1724
ISSN0040-6090
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 60
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