Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2004-12-06
Physics
Condensed Matter
Disordered Systems and Neural Networks
20 pages, 6 figures, published in Ber. Bunsenges. Phys. Chem
Scientific paper
Surface sensitive x-ray scattering techniques with atomic scale resolution are employed to investigate the microscopic structure of the surface of three classes of liquid binary alloys: (i) Surface segregation in partly miscible binary alloys as predicted by the Gibbs adsorption rule is investigated for Ga-In. The first layer consists of a supercooled In monolayer and the bulk composition is reached after about two atomic diameters. (ii) The Ga-Bi system displays a wetting transition at a characteristic temperature T_w~220 C. The transition from a Bi monolayer on Ga below T_w to a thick Bi-rich wetting film above T_w is studied. (iii) The effect of attractive interactions between the two components of a binary alloy on the surface structure is investigated for two Hg-Au alloys.
Deutsch Moshe
DiMasi Elaine
Ocko Ben M.
Pershan Peter S.
Shpyrko Oleg G.
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