Influence of electric fields on dielectric properties of GPI ferroelectric
Abstract
Using modified microscopic model of GPI by taking into account the piezoelectric coupling with strains i in the frames of two-particle cluster approximation, the components of polarization vector and static dielectric permittivity tensor of the crystal at applying the external transverse electric fields E1 and E3 are calculated. An analysis of the influence of these fields on thermodynamic characteristics of GPI is carried out. A satisfactory quantitative description of the available experimental data for these characteristics has been obtained at a proper choice of the model parameters.
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