Abstract
The Rb depth profiles in KTP as a function of ion-exchange duration in rubidium nitrate (RbNO 3) melts with small concentrations of Ba(NO 3 ) 2 in the melt have been studied by using Rutherford backscattering (RBS). The data indicate that small Ba concentrations have a major effect on the incorporation of Rb and its distribution in the KTP. The results also show the effect of the Ba impurity in Rb ion-exchange is a function of the duration of exchange and varies substantially as the impurity concentration increases. The ion-exchange of pure Rb shows a possible formation of a diffusion barrier which leads to a lesser near-surface concentration as the exchange duration increases. A small concentration of Ba removes this diffusion barrier.
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