Europium diffusion in single crystal samarium sulfide

Abstract

The process of europium diffusion in samarium sulfide (SmS) has been studied for the first time. Experiments performed with 152Eu radioactive isotope in a temperature interval from 950 to 1050°C showed that the diffusion coefficient varies within 10−12–10−9 cm2/s and depends on the temperature as D=6×1019exp(−6.18/kT). It is concluded that Eu impurity atoms diffuse in the SmS lattice predominantly via the lattice sites.