Investigation of Dielectric Behaviors and a.c. Conduction of a-Se90Cd10–xSbx (2 ≤ x ≤ 8) Chalcogenide Glass

Abstract

The dielectric relaxation and ac conduction play a vital role to understand the mechanism of conduction. The structure and defects of solid can be determined by dielectric relaxation whereas the nature of defect states and their density of states can be studied by a. c. conductivity. In the present work, we have prepared a novel Se90Cd10–xSbx (2 ≤ x ≤ 8) glass in bulk form by conventional melt quenching technique. The investigation of dielectric behavior and conduction of amorphous Se90Cd10–xSbx (2 ≤ x ≤ 8) of pellets has been studied in the frequency span 5 × 102–1 × 105 Hz at temperature 323 K. It is observed that the dielectric constants (ɛ′) dielectric loss (ɛ″), loss angle (tan (δ)) and AC conductivity (σac) show the frequency dependent behavior. It is also noticed that ɛ′, ɛ″, tan(δ) and σac decreases with increase of Sb concentration in Se90Cd10–xSbx (2 ≤ x ≤ 8) glassy alloys.