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Philosophical Magazine Volume 86, 2006 - Issue 6-8: Proceedings of the 9th International Conference on Quasicrystals, 22–26 May 2005, Part 2 Guest Editors: Cynthia J. Jenks, Daniel J. Sordelet and Patricia Thiel

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Adsorption of cobalt on the tenfold surface of d-Al₇₂Ni₁₁Co₁₇ and on the fivefold surface of i-Al₇₀Pd₂₁Mn₉

J. A. Smerdon Surface Science Research Centre, The University of Liverpool, Liverpool L69 3BX, UK

J. Ledieu Surface Science Research Centre, The University of Liverpool, Liverpool L69 3BX, UK

J. T. Hoeft Surface Science Research Centre, The University of Liverpool, Liverpool L69 3BX, UK

D. E. Reid Surface Science Research Centre, The University of Liverpool, Liverpool L69 3BX, UK

L. H. Wearing Surface Science Research Centre, The University of Liverpool, Liverpool L69 3BX, UK

R. D. Diehl Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802, USA

T. A. Lograsso Ames Laboratory, Iowa State University, Ames, IA 50011, USA

A. R. Ross Ames Laboratory, Iowa State University, Ames, IA 50011, USA

R. Mcgrath Department of Physics and Surface Science Research Centre, The University of Liverpool, Liverpool L69 3BX, UKCorrespondence[email protected]

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Pages 841-847 | Received 13 May 2005, Accepted 18 Jul 2005, Published online: 19 Aug 2006

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https://doi.org/10.1080/14786430500263447

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Abstract

The adsorption behaviour of Co on the tenfold surface of d-Al₇₂Ni₁₁Co₁₇ and on the fivefold surface of i-Al₇₀Pd₂₁Mn₉ has been studied using scanning tunnelling microscopy (STM), Auger electron spectroscopy (AES) and low-energy electron diffraction (LEED). The analysis of a distinctive quasiperiodic LEED pattern for coverages from 3–30 ML of Co on d-Al₇₂Ni₁₁Co₁₇ suggests that the Co forms in a pseudomorphic row structure composed of domains of Fibonacci spaced rows having a periodic lattice parameter along the rows of 2.5 ± 0.1 Å. The same structure, though less well-ordered and with a larger lattice parameter, is formed on the fivefold surface of i-Al₇₀Pd₂₁Mn₉.

Acknowledgements

This material is based upon work supported by the EPRSC under Grant No. GR/S19080/01, the National Science Foundation under Grant No. 0208520, the US Department of Energy and the EU Marie Curie Host Development fund.

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