The conductivity spectra of glasses in the system, ZrF4-BaF2-YF2-LiF, were determined at various temperatures, and frequencies ranging from 10Hz to 2MHz. The data were analyzed in terms of the Almond-West formalism. The concentration and hopping frequency of the charge carriers, the direct-current conductivity and the activation energy were deduced by analyzing the data. The concentration of the charge carriers was observed to be almost independent of temperature, and only weakly dependent upon composition. Both the hopping frequency and the direct-current conductivity went through a minimum at xLiF = 0.20. It was noted that charge transport in the glasses occurred via the hopping mechanism, and that the strong-electrolyte model was applicable.

Dependence of the Conductivity on the Concentration and the Hopping Frequency of Charge Carriers in Fluoride Glasses. M.Sural, A.Ghosh: Physical Review B, 2000, 61[13], 8610–3