Journal of Physical Studies 11(3), 289–293 (2007) DOI: https://doi.org/10.30970/jps.11.289 THE MODELLING OF DIELECTRIC SPECTRA OF THE δ-PHASE Bi2O3 FILMS I. M. Chernenko, V. M. Duda, K. V. Chasovsky Dnipropetrovsk National University 13 Naukova St., Dnipropetrovsk, 49050, Ukraine

Every dispersion species from three different ones observed in the dielectric spectra $ε'(ω)$, $ε”(ω)$ of $δ$-Bi$_{2}$O$_{3}$ films in the temperature interval 20-200$^{\circ}$C has been fit by the frequency characteristics of the simplest $RC$-circuits whose ideal capacities were changed by ‟universal” ones. A resultant equivalent circuit (consisting of two ‟universal” capacities $C_{n}(ω)=B_{n}(jω)^{n}$, $C_{m}(ω)=B_{m}(jω)^{m}$ and a single active resistor $R$) whose frequency characteristics reflects experimental data sufficiently well are suggested. At $n$, $m=1$ this circuit represents well known Debye equivalent circuit. In accordance with the suggested dispersion mechanisms the obtained results have allowed to determine the temperature dependencies of the volume $dc$-conductivity $σ(0)$, conduction and space charge relaxation times $τ_{1}$ and $τ_{2}$, respectively, as well as volume dielectric permittivity $ε_ınfty}$, space charge region capacitance $C_{\rm sc}$, and parameters $(n, m)$ characterizing ‟universal” capacities.

PACS number(s): 73.40.-c

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