Journal
JOURNAL OF MATERIALS SCIENCE
Volume 44, Issue 21, Pages 5760-5767Publisher
SPRINGER
DOI: 10.1007/s10853-009-3807-y
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Semiconducting oxide glasses of the system (80 - x)Bi2O3-20PbO-xFe(2)O(3), where x = 5, 10 and 15 mol.%, were prepared and investigated for dielectric properties in the frequency range 120-100 KHz and temperature range 300-550 K. Analysis of the electrical properties has been made in the light of small polaron hopping model. The parameters obtained from the fits of the experimental data to this model are reasonable and consistent with glass composition. The conduction is attributed to non-adiabatic hopping of small polaron. The ac conductivity results suggest that the correlated barrier hopping (CBH) is dominant in ac conductivity.
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