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|Title:||dc Conductivity and dielectric properties of V₂O₅-Bi₂O₃-ZnO glass|
|Authors:||Shukla, D K|
Polaronic hopping models
Semiconducting oxide glass
|Abstract:||Semiconducting oxide glass with composition 40 V₂O₅-40Bi₂O₃-20ZnO is prepared by rapid quenching method. The glassy phase is confirmed from X-ray diffraction (XRD) pattern which shows a broad hump around 2 = 30o. The dc conductivity of the glass has been measured in the temperature range 300 – 600 K and compared with that of other vanadium and copper based zinc oxide containing glasses. The dc conductivity is due to non-adiabatic small polaron hopping conduction which is confirmed from the fitting of the conductivity data with different polaronic hopping models. The frequency (75 kHz - 30 MHz) dependent dielectric constant of the glass decreases first and then increases with the increase of frequency at room temperature. The anomaly in frequency dependent dielectric constant at ~ 5 MHz may be due to the displacement and/or orientational motion of BiO₃ and BiO₆ structural units present in the glass.|
|Appears in Collections:||IJPAP Vol.45(01) [January 2007]|
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