Abstract
The surface composition of various copper-palladium alloy systems has been determined by means of ISS (Ion Surface Scattering). Four alloys with different bulk composition as well as the pure elements were examined. Cleaning the surface by sputtering with Ar ions results in Cu enrichment for Pd rich alloys and no or little enrichment of Pd for Cu rich alloys. Annealing the targets leads to Cu enrichment in all alloys investigated. Depth profiles of Cu 35Pd 65 show the altered layer several monolayers thick.
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