A weak mixed mobile ion effect in vanadium–tellurite oxide glass modified by silver and lithium cations

The effect of the partial replacement of lithium oxide by silver oxide in a glassy vanadium–molybdenum–tellurite oxides matrix is analyzed by means of impedance spectroscopy. We find that a weak mixed mobile ion effect (MMIE) is due to the different kind of modifications silver and lithium oxides induce in the glass of formula 0.7[x Ag2O (1 − x) Li2O] 0.3[0.5 V2O5 0.5 MoO3] 2 TeO2.