Room temperature dielectric properties of the As40S(60 − x)Sex glass system

The relative dielectric constant (ε′), relative loss factor (ε″), and loss tangent ( tan δ) of the chalcogenide As40S(60 − x)Sex glasses (x=0, 20, 40, and 60 at.% Se) at room temperature have been investigated in the frequency range of 108–1010 Hz. Since the relative dielectric constant is related to polarization, the contribution of electronic and dipolar polarizations can be determined. As the Se content in the glass network increases, electronic polarization contributes up to approximately 78% of the relative dielectric constant for As40Se60 glass. This is mainly attributed to the larger electronic polarizability of the Se atom.