e-Journal of Surface Science and Nanotechnology
Online ISSN : 1348-0391
ISSN-L : 1348-0391
Regular Papers
Cubic Zirconia Crystalline Surface Oxide Epitaxial Formation on ZrB2(0001) Confirmed by Circularly-Polarized-Light Photoelectron Diffraction
Rie HorieFumihiko MatsuiNaoyuki MaejimaHirosuke MatsuiKota TanakaHiroshi DaimonTomohiro MatsushitaShigeki OtaniTakashi Aizawa
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2015 Volume 13 Pages 111-114


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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