BEHAVIOR OF INTERSTITIAL IMPURITIES ON THE SURFACE OF YTTRIUM DURING SOLID-STATE ELECTROTRANSPORT - AUGER STUDIES

Investigations of electromigration of interstitial impurities O, C and N on the yttrium surface during solid state electrotransport in ultra high vacuum have been carried out by the method of Auger electron spec troscopy. It was shown that the behaviour of impurities on a surface c orrelated with that in the bulk during the electrotransport and a cons iderable segregation of O and C was taking place on the surface at red uced temperature. The analysis of possible mechanisms of the segregati on has revealed non-equilibrium segregation as the most probable reaso n for the segregation. The parameters determining the segregation have been estimated.