Cubic Zirconia Crystalline Surface Oxide Epitaxial Formation on ZrB<sub>2</sub>(0001) Confirmed by Circularly-Polarized-Light Photoelectron Diffraction

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Author(s)

    • Horie Rie
    • Graduate School of Materials Science, Nara Institute of Science and Technology
    • Matsui Fumihiko
    • Graduate School of Materials Science, Nara Institute of Science and Technology
    • Maejima Naoyuki
    • Graduate School of Materials Science, Nara Institute of Science and Technology
    • Matsui Hirosuke
    • Graduate School of Materials Science, Nara Institute of Science and Technology
    • Tanaka Kota
    • Graduate School of Materials Science, Nara Institute of Science and Technology
    • Daimon Hiroshi
    • Graduate School of Materials Science, Nara Institute of Science and Technology

Abstract

Pure cubic zirconia (<i>c</i>-ZrO<sub>2</sub>) is unstable at room temperature. We achieved the epitaxial formation of <i>c</i>-ZrO<sub>2</sub> crystalline surface oxide islands on ZrB<sub>2</sub>(0001) by annealing the substrate without sample cleaning at 950°C under ultrahigh-vacuum conditions. The interface structure at the <i>c</i>-ZrO<sub>2</sub> islands and the ZrB<sub>2</sub>(0001) substrate was investigated using element-specific circularly-polarized-light photoelectron diffraction, angle-resolved X-ray photoelectron spectroscopy, and reflection high-energy electron diffraction (RHEED). The ZrO<sub>2</sub>(111) islands was a twin crystal oriented in ZrO<sub>2</sub>[1 -1 0]//ZrB<sub>2</sub>[2 -1 -1 0], and was stable up to around 1500°C. The Zr-Zr distance of ZrB<sub>2</sub> bulk and that of ZrO<sub>2</sub>(111) agree with at the ratio of 8 to 7. [DOI: 10.1380/ejssnt.2015.111]

Journal

  • e-Journal of Surface Science and Nanotechnology

    e-Journal of Surface Science and Nanotechnology 13(0), 111-114, 2015

    The Surface Science Society of Japan

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