Role of AgI for ionic conduction inAgI−AgPO3glasses

Using frequency and temperature-dependent conductivity data for $x$ $\mathrm{AgI}\cdot \left(1\mathrm{}-x\right)$ ${\mathrm{AgPO}}_3$ glasses in the composition range from $x=0.10\mathrm{}$ to $x=0.55,$ we find that the number density of mobile ions as well as the ionic relaxation mechanism are independent of temperature and composition. We believe that this result is important in order to clarify the controversial role of AgI for the ion transport in these glasses. Moreover, our observation should generally impact on the understanding of fast ion conduction in glass. In the frequency range covered in our study, i.e., at frequencies below a few MHz, a superlinear dependence of the conductivity on frequency as reported recently has not been observed.