Room temperature dielectric properties of the As40S((60-x))Se-x glass system

The relative dielectric constant (epsilon'), relative loss factor (epsilon "), and loss tangent (tan delta) of the chalcogenide As40S(60-x)Sex glasses (x=0, 20, 40, and 60 at.% Se) at room temperature have been investigated i n the frequency range of 10(8)-10(10) HZ. Since the relative dielectric con stant is related to polarization, the contribution of electronic and dipola r polarizations can be determined. As the Se content in the glass network i ncreases, electronic polarization contributes up to approximately 78% of th e relative dielectric constant for As40Se60 glass. This is mainly attribute d to the larger electronic polarizability of the Se atom. (C) 2000 Publishe d by Elsevier Science B.V. All rights reserved.