![]() These phenomena are similar to those observed under Ar+ bombardment and support a point of view maintaining that the BEGS effect plays the dominant role in the determination of the surface composition of a sputtered Au0.5Cu0.5 alloy even under bombardment with the lighter nitrogen ion. ![]() temperature increased above RT, the BEGS effect was further strengthened, leaving gold more and more depleted in the subsurface. When the N ion energy increased from 0.2 to 2 keV, the mass effect became less important and the bombardment-enhanced-Gibbsian-segregation (BEGS) effect played a more important role. The variation in the surface composition of a Au0.5Cu0.5 alloy under bombardment with N and Ar ions at energies from 0.2 to 2 keV and at target temperatures from RT to 300☌ was investigated.
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