Dynamic properties of NH$_3$CH$_2$COOH$\cdot$H$_2$PO$_3$ ferroelectric

TL;DR

This paper models the dynamic dielectric properties of a specific ferroelectric compound using a modified pseudospin approach that includes piezoelectric coupling, successfully matching experimental data for permittivity.

Contribution

It introduces a modified pseudospin model incorporating piezoelectric coupling to analyze the dynamic properties of NH$_3$CH$_2$COOH$dot$H$_2$PO$_3$ ferroelectric, providing theoretical results aligned with experiments.

Findings

Calculated dielectric permittivity components and relaxation times.

Achieved good agreement with experimental permittivity data.

Analyzed frequency and temperature dependence of dielectric properties.

Abstract

Using a modified pseudospin model of NH$_3$CH$_2$COOH$\cdot$H$_2$PO$_3$ ferroelectric taking into account the piezoelectric coupling with strains $\varepsilon_i$, $\varepsilon_4$, $\varepsilon_5$ and $\varepsilon_6$ within Glauber method in two-particle claster approximation, we have calculated components of dynamic dielectric permittivity tensor and relaxation times of the model. At the proper set of theory parameters, frequency and temperature dependences of the components of permittivity and temperature dependences of the relaxation times are studied. A satisfactory agreement of the theoretical results with experimental data for longitudinal permittivity is obtained.