AC-Conductivity and Dielectric Properties of γ-Irradiated PVA Films Doped With Mn2+ Ions | ||||
| Egyptian Journal of Solids | ||||
| Article 9, Volume 23, Issue 2, 2000, Page 277-286 PDF (77.34 K) | ||||
| DOI: 10.21608/ejs.2000.151737 | ||||
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| 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 ε’ 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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