Reinhard Streitel

Surface Crystallization in a Liquid AuSi Alloy

X-ray measurements reveal a crystalline monolayer at the surface of the eutectic liquid Au82Si18, at temperatures above the alloys 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.

Atomic-Scale Surface Demixing in a Eutectic Liquid BiSn Alloy

Resonant x-ray reflectivity of the surface of the liquid phase of the Bi(43)Sn(57) eutectic alloy reveals atomic-scale demixing extending over three near-surface atomic layers. Because of the absence of an underlying atomic lattice which typically defines adsorption in crystalline alloys, studies of adsorption in liquid alloys provide unique insight on interatomic interactions at the surface. The observed composition modulation could be accounted for quantitatively by the Defay-Prigogine and Strohl-King multilayer extensions of the single-layer Gibbs model, revealing a near-surface domination of the attractive Bi-Sn interaction over the entropy.

Crystalline surface phases of the liquid Au-Si eutectic alloy

A two-dimensional crystalline layer is found at the surface of the liquid eutectic

Surface structure of liquid Bi and Sn: An x-ray reflectivity study

{\mathrm{Au}}_{82}{\mathrm{Si}}_{18}

X-ray reflectivity studies of atomic-level surface-segregation in a liquid eutectic alloy of AuSn

alloy above its melting point

Crystalline Surface Phases of Liquid AuSi Alloy

{T}_{M}=359\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}

Surface Demixing in a AuSn Liquid Alloy

. Underlying this crystalline layer, we find a layered structure, 6\char21{}7 atomic layers thick. This surface layer undergoes a first-order solid-solid phase transition occurring at

Surface Freezing in Liquid Gold-Silicon Eutectic Alloy investigated with Surface X-ray Diffraction

371\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}

Gibbs Adsorption in Binary Liquid Mixtures: Concentration Variations Beyond Surface Monolayer in BiSn alloy

. The crystalline phase observed for

Surface induced atomic scale demixing in BiSn eutectic alloy

Tg371\phantom{\rule{0.2em}{0ex}}\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}