Sulphur restraint of surface sites in Co-5.4at.%Ru alloy

Abstract

Using Auger electron spectroscopy, site competition in surface segregation of sulphur and phosphorus in a polycrystalline Co-5.4at.%Ru alloy was investigated. Annealing of the sample at 1250 K results in sulphur desorption. Then the phosphorus segregation starts to increase. A model of the surface which explains the observed phenomenon is presented.