THEAu3Pd(001) SURFACE STUDIED BY ION SCATTERING AND LEED

S. Speller, M. Aschoff, J. Kuntze, W. Heiland, A. Atrei, U. Bardi and E. Platzgummer
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S. Speller: Universität Osnabrück, 49069 Osnabrück, Germany
M. Aschoff: Universität Osnabrück, 49069 Osnabrück, Germany
J. Kuntze: Universität Osnabrück, 49069 Osnabrück, Germany
W. Heiland: Universität Osnabrück, 49069 Osnabrück, Germany
A. Atrei: Dipartimento di Scienze e Tecnologie Chimiche e dei Biosistemi, Università di Siena, 53100 Siena, Italy
U. Bardi: Dipartimento di Chimica, Università di Firenze, 50121 Firenze, Italy
E. Platzgummer: Inst. für Allgemeine Physik, TU Wien, A-1040 Wien, Austria

Surface Review and Letters (SRL), 1999, vol. 06, issue 05, 829-833

Abstract: The (001) surface of aAu3Pdsingle crystal was studied with different surface analytical techniques. The main results reported about structure, composition and dynamics of the surface are based on ion scattering methods and LEED. We find segregation of Au to the surface forming a complete Au overlayer. The second layer has approximately the bulk Pd concentration. There is no evidence for chemical order in the near surface layers, i.e. Pd is randomly distributed in the lattice. The Au and Pd atoms in the first and the second layer respectively have approximately the same thermal vibrational amplitudes.

Date: 1999
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DOI: 10.1142/S0218625X99000871

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