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Philosophical Magazine Volume 87, 2007 - Issue 18-21: Proceedings of Aperiodic, 2006
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Original Articles

First UHV surface studies of single-grain icosahedral Ag–In–Yb quasicrystal

H. R. Sharmaa National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
,
M. Shimodaa National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan;b Solution-Oriented Research for Science and Technology, Japan Science and Technology Agency, Kawaguchi, Saitama, 332-0012, Japan
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S. Ohhashic Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, 980-8577, Japan
&
A. P. Tsaib Solution-Oriented Research for Science and Technology, Japan Science and Technology Agency, Kawaguchi, Saitama, 332-0012, Japan;c Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, 980-8577, Japan
Pages 2989-2994 | Received 31 Aug 2006, Published online: 02 Dec 2010
 
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Abstract

We present the first ultrahigh vacuum (UHV) surface study of single-grain icosahedral Ag–In–Yb quasicrystal by using X-ray photoelectron spectroscopy (XPS), reflection high-energy electron diffraction (RHEED), and scanning tunnelling microscopy (STM). This new quasicrystal is found to exhibit surfaces with steps and terraces, upon suitable preparation conditions. The Fourier transform of high-resolution STM images and RHEED patterns reveal that the surface after annealing at appropriate temperatures retains quasicrystalline long-range order. The analysis of XPS data measured from this surface shows a near bulk chemical composition in the surface region.

Acknowledgements

APT and MS would like to gratefully acknowledge financial support from JST Solution-Oriented Research for Science and Technology (SORST).

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