Effect of silver on dielectric properties of the Se-Te system

The DC conductivity and dielectric parameters of the system of a-Se96−xTe4Agx (x=0, 4, 8, 12 and 16) glasses have been investigated. The frequency and temperature dependence of the dielectric constants (ε′) and the dielectric loss (ε″) have been studied in the frequency range from 120 Hz to 100 kHz and the temperature range 300-390 K. Dielectric dispersion is observed when Ag is incorporated into the a-Se-Te system in the entire temperature range. These results are explained on the basis of DC conduction loss and dipolar-type dielectric dispersion. It is also observed that the DC conductivity increases and the activation energy decreases upon increasing Ag content in the system.