Abstract:
A numerical analysis of the features of the dielectric spectra of crystalline substances deposited on insulating substrates, excluding the possibility of through-current flow, is carried out. The analysis is based on the use of the distribution function of the numbers of relaxers according to their relaxation times. It is shown that the principles of numerical analysis are different for different types of features of dielectric spectra. The Gavrilyak–Negami function is used to analyze features occupying narrow frequency ranges ($\Delta\omega\le1$ order of magnitude $\omega$). For wider ranges ($\Delta\omega\sim$ 2–3 orders of magnitude), the improved Gavrilyak–Negami function is used. For the broadest features ($\Delta\omega>$ 3 orders of magnitude), the role of the distribution function is played by the function of the frequency dependence of the imaginary part of the dielectric constant $\varepsilon''(f)$, which is obtained experimentally. Before use, this function is converted to the function $\varepsilon''(\tau)$, and the shape of this function is adjusted using a special algorithm.
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