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19 April 2024

» arxiv » cond-mat/0702193

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X-ray Reflectivity Studies of Atomic-level Surface-segregation in a Liquid Eutectic Alloy of AuSn
Venkatachalapathy S. K. Balagurusamy ; Reinhard Streitel ; Oleg G. Shpyrko ; P. S. Pershan ; Mati Meron ; Binhua Lin ;
Date:	8 Feb 2007
Subject:	Materials Science
Abstract:	X-ray reflectivity studies reveal atomic-level surface-segregation at the free surface of the eutectic Au71Sn29 liquid alloy. The surface-segregation extends up to three layers, in which the top layer is almost a pure monolayer of Sn, the second layer is almost a pure monolayer of Au and the third layer appears to be slightly enhanced in Au. Although the surface-segregation concentration profiles can be qualitatively accounted for by the theories of Defay-Prigogine and Strohl-King, they cannot satisfactorily account for the measured surface tension. PACS numbers: 61.20.-p, 61.10.-i, 68.03.-g
Source:	arXiv, cond-mat/0702193
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