Abstract
The stability as well as the electrical properties of both unirradiated and γ-irradiated poly(vinyl alcohol)-PVA films doped with MnSO4.H2O at a definite concentration of 15% have been studied. The dielectric loss tangent tan δ, electrical conductivity σ and dielectric constant e’ in the frequency range 100 Hz-20 KHz were measured at different temperatures. It has been demonstrated that the suitable mechanism of conduction is the correlated barrier hopping model. The exponent S according to the relation σ(ω )=A(ω ) s was estimated and found to be less than unity and decreased with increasing the temperature Furthermore a nonlinearly of log σ against log f was observed at log f in the range (3.7-4.3) for doses ≥100 kGy at the temperatures of 333 and 343 k.
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