Cubic Zirconia Crystalline Surface Oxide Epitaxial Formation on ZrB2(0001) Confirmed by Circularly-Polarized-Light Photoelectron Diffraction

Rie Horie; Fumihiko Matsui; Naoyuki Maejima; Hirosuke Matsui; Kota Tanaka; Hiroshi Daimon; Tomohiro Matsushita; Shigeki Otani; Takashi Aizawa

doi:10.1380/ejssnt.2015.111

Regular Papers

Cubic Zirconia Crystalline Surface Oxide Epitaxial Formation on ZrB₂(0001) Confirmed by Circularly-Polarized-Light Photoelectron Diffraction

Rie Horie, Fumihiko Matsui, Naoyuki Maejima, Hirosuke Matsui, Kota Tanaka, Hiroshi Daimon, Tomohiro Matsushita, Shigeki Otani, Takashi Aizawa

Author information

Rie Horie
Graduate School of Materials Science, Nara Institute of Science and Technology
Fumihiko Matsui
Graduate School of Materials Science, Nara Institute of Science and Technology
Naoyuki Maejima
Graduate School of Materials Science, Nara Institute of Science and Technology
Hirosuke Matsui
Graduate School of Materials Science, Nara Institute of Science and Technology
Kota Tanaka
Graduate School of Materials Science, Nara Institute of Science and Technology
Hiroshi Daimon
Graduate School of Materials Science, Nara Institute of Science and Technology
Tomohiro Matsushita
Japan Synchrotron Radiation Research Institute (JASRI), SPring-8
Shigeki Otani
National Institute for Materials Science (NIMS)
Takashi Aizawa
National Institute for Materials Science (NIMS)

Keywords: Photoelectron diﬀraction, Soft X-ray photoelectron spectroscopy, Reﬂection high-energy electron diﬀraction (RHEED), Surface structure, c-ZrO₂, ZrB₂, Epitaxial surface oxide

JOURNAL FREE ACCESS

2015 Volume 13 Pages 111-114

DOI https://doi.org/10.1380/ejssnt.2015.111

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Abstract

Pure cubic zirconia (c-ZrO₂) is unstable at room temperature. We achieved the epitaxial formation of c-ZrO₂ crystalline surface oxide islands on ZrB₂(0001) by annealing the substrate without sample cleaning at 950°C under ultrahigh-vacuum conditions. The interface structure at the c-ZrO₂ islands and the ZrB₂(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 ZrO₂(111) islands was a twin crystal oriented in ZrO₂[1 -1 0]//ZrB₂[2 -1 -1 0], and was stable up to around 1500°C. The Zr-Zr distance of ZrB₂ bulk and that of ZrO₂(111) agree with at the ratio of 8 to 7. [DOI: 10.1380/ejssnt.2015.111]

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