Surface Crystallization in a Liquid AuSi Alloy

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Surface Crystallization in a Liquid AuSi Alloy

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Title: Surface Crystallization in a Liquid AuSi Alloy
Author: Shpyrko, Oleg G.; Streitel, Reinhard; Balagurusamy, Venkatachalapathy S. K.; Grigoriev, Alexei Y.; Deutsch, Moshe; Ocko, Benjamin M.; Meron, Mati; Lin, Binhua; Pershan, Peter S.

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Citation: Shpyrko, Oleg G., Reinhard Streitel, Venkatachalapathy S. K. Balagurusamy, Alexei Y. Grigoriev, Moshe Deutsch, Benjamin M. Ocko, Mati Meron, Binhua Lin, and Peter S. Pershan. 2006. Surface crystallization in a liquid AuSi alloy. Science 313(5783): 77-80.
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Abstract: X-ray measurements reveal a crystalline monolayer at the surface of the eutectic liquid \(Au_{82}Si_{18}\), at temperatures above the alloy's melting point. Surface-induced atomic layering, the hallmark of liquid metals, is also found below the crystalline monolayer. The layering depth, however, is threefold greater than that of all liquid metals studied to date. The crystallinity of the surface monolayer is notable, considering that AuSi does not form stable bulk crystalline phases at any concentration and temperature and that no crystalline surface phase has been detected thus far in any pure liquid metal or nondilute alloy. These results are discussed in relation to recently suggested models of amorphous alloys.
Published Version: doi:10.1126/science.1128314
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