Effect of hydrostatic pressure on dynamic dielectric characteristics of CsH$_2$PO$_4$ ferroelectric

TL;DR

This study models how hydrostatic pressure affects the dynamic dielectric properties of CsH$_2$PO$_4$ ferroelectric crystals using a pseudospin approach within the Glauber framework, providing theoretical insights into their temperature and frequency responses.

Contribution

It introduces a pseudospin-based theoretical model to analyze the pressure-dependent dynamic dielectric behavior of CsH$_2$PO$_4$ crystals, including derivations of dielectric constant and relaxation time.

Findings

Hydrostatic pressure significantly influences dielectric response.

The model predicts temperature and frequency dependence of dielectric properties.

Numerical analysis confirms pressure effects on relaxation dynamics.

Abstract

Based on the pseudospin model of the deformed CsH$_2$PO$_4$ crystal within the Glauber method, the equation for the time-dependent mean value of the pseudospin is obtained, which is solved in the case of small deviations from the equilibrium state. Using the solution of the equation, we find expressions for the longitudinal dynamic dielectric constant and relaxation time. Based on the proposed parameters of the theory, the temperature and frequency dependences of the dynamic dielectric constant and the temperature dependence of the relaxation time are calculated and investigated. A detailed numerical analysis of the obtained results was performed. The influence of hydrostatic pressure on the dynamic characteristics of CsH$_2$PO$_4$ is studied.