Abstract
The temperature and frequency dependence of dielectric constant ( ε′) and dielectric loss ( ε″) are studied in the bulk glassy samples of Ga x Se 100− x alloys (where x=0, 2.5, 5.0, 7.5 and 10.0) in the temperature (300–360 K) and frequency (0.12–100 KHz) range, respectively. A strong dielectric dispersion has been observed when Ga is added to a-Se in the entire temperature range. The DC conductivity has also been measured to see the effect of Ga on DC conduction loss which is found to be prominent. The results are interpreted in terms of dipolar theory for a-Se and a-Ga 2.5Se 97.5 samples while the remaining samples have been explained in terms of DC conduction loss.
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