Abstract
The surface segregation of Sn in liquid GaSn alloys has been studied by Auger electron spectroscopy as a function of bulk concentration at 350° C. The Sn was found to be strongly adsorbed at the surface. The surface concentrations of Sn and Ga were calculated from the Auger measurements using inelastic mean free paths and backscattering factors estimated in recent theoretical work. The values found for the surface concentrations are essentially in agreement with those deduced from surface tension measurements using Gibbs adsorption theory. This result supports a monolayer adsorption distribution in the GaSn system.
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