Audiofrequency dielectric dispersion of T. G. Se.: Universal behaviour and temperature dependence of the n index in the phase transition

Abstract

Experimental values for the complex dielectric permittivity of Triglycine Selenate single crystal are reported, on both sides of the ferroelectric Curie temperature, covering the. audiofrequency range. The dielectric losses and the real part of the susceptibility follow the empirical relation: χ″(ω) ∼ χ′ (ω) ∼ ωⁿ⁻¹, according to the Jonscher Universal law. The dynamic contributions of domains have been evaluated. The obtained values for the n index show a discontinuity in the ferro-paraelectric transition.