Dielectric dispersion in Te₉Se₇₂Ge_19-xSb_x (x=8, 9, 10, 11, 12) chalcogenide glassy alloy

摘要

Dielectric dispersion and conductivity of Te 9 Se 72 Ge 19-x Sb x (x = 8, 9, 10, 11, 12) chalco genide glassy allo y has been studied in frequency range 500 Hz to 1 M Hz and temperature range (300K-363K) below glass transformatio n region. Effect of temperature and frequency on dielectric response and conductivity of the material has been explained thoroughly using appropriate models. Activation energy of ac conductivity and other dielectric parameters have also been calculated to explore material's conduction mechanism and dielectric behaviour.