Abstract:
The transmission/reflection spectra of bilayer structures consisting of thin amorphous and polycrystalline Pb(Zr$_{0.52}$Ti$_{0.48}$)O$_3$ ferroelectric films deposited on dielectric substrates of magnesium oxide MgO and sapphire $\alpha$-Al$_2$O$_3$ were measured in the frequency range of 5–4000 cm$^{-1}$. Based on these spectra and using the dispersion analysis method, the spectra of complex dielectric permittivity $\varepsilon^*(\nu)$ and dynamic conductivity $\sigma'(\nu)$ of the films were simulated, the electrodynamic parameters of the films were determined, and the dielectric dispersion responsible for the formation of static permittivity was found.