The surface structure and composition of the low index single crystal faces of the ordered alloy Pt3Sn |
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Authors: | Alexandra N Haner Philip N Ross Ugo Bardi |
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Affiliation: | (1) Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, 94720 Berkeley, CA, USA;(2) Department of Chemistry, University of Florence, Florence, Italy |
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Abstract: | The surface composition and structure of 111 , 100 , and 110 oriented single crystals of the ordered alloy Pt3Sn (Ll2 or Cu3Au-type) were determined using the combination of low energy electron diffraction (LEED) and low energy ion scattering spectroscopy (LEISS). The clean annealed surfaces displayed LEED patterns and Sn/Pt LEISS intensity ratios consistent with the surface structures expected for bulk termination. In the case of the 100 and 110 crystals, preferential termination in the mixed (50% Sn) layer was indicated, suggesting this termination to be the consequence of a thermodynamic preference for tin to be at the surface. |
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Keywords: | Platinum-tin alloy low energy ion-scattering (LEISS) from low energy electron diffraction (LEED) from |
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