Analysis of rare-earth ion spatial distribution in fluorophosphate glasses in terms of segregation phenomenon

The study deals with complex investigation of segregation phenomenon of Eu3+Eu3+ (1.0mol%EuF3EuF3) and Tb3+Tb3+ ions (1.2mol%TbF3TbF3) in Ba(PO3)2Ba(PO3)2–MgCaSrBaAl2F14MgCaSrBaAl2F14 glasses, by using photoluminescence methods, followed by Rayleigh and Mandelstam–Brillouin scattering (RMBS) measurements. It is shown that the local environment of rare-earth ions depends on the ratio of rare-earth concentration and phosphate component content. The results are interpreted in terms of doping-ion segregation model.