Dielectric properties of ferroelectric crystals at high concentrations of elementary excitations

Abstract

The analysis of dielectric properties of KDP crystals at high concentrations of elementary excitations (near the transition temperature) has shown the existence of a peak in the absorption coefficient in the long-wavelength region. This peak is due to the kinematical interaction of elementary excitations which is more expressive at high concentrations. At low concentrations the mentioned peak disappears. The refraction coefficient is analysed in this paper too. © 1983.