Dielectric relaxation in glassy Se₇₀Te_30-xAg_x

Abstract

Temperature dependence of dielectric constant (e')and dielectric loss (e") are studied in glassy Se₇₀Te_30-xAg_xwhere <i style="">x</i> is varied from 0 to 10 in the frequency range 1to 10 kHz and temperature range 300-350 K. The results indicate that the dielectric dispersion exists in the above frequency and temperature range. Loss peaks in e" versus <i style="">T</i> curve could be observed in ternary Se₇₀Te_30-xAg_x alloys. However, such loss peaks could not be observed in binary Se₇₀Te₃₀ alloy, which indicates that Ag incorporation in binary system, is responsible for such behaviour. This is explained in terms of [(D^-) (Ag⁺)] dipoles which otherwise were not present in the undoped samples.