Deformation effects in glycinium phosphite ferroelectric

TL;DR

This paper investigates how mechanical stresses like pressure and shear affect the phase transition and physical properties of glycinium phosphite ferroelectric using a modified cluster model that includes piezoelectric coupling.

Contribution

It introduces a modified model accounting for piezoelectric coupling to study deformation effects in glycinium phosphite ferroelectric.

Findings

Shear stresses influence phase transition behavior.

Hydrostatic and uniaxial pressures alter dielectric and piezoelectric properties.

The model predicts changes in polarization and permittivity under stress.

Abstract

To study the effects appearing under mechanical stresses, we have used the model of glycinium phosphite ferroelectric, modified by taking into account the piezoelectric coupling of ordering structure elements with lattice strains. In the frames of two-particle cluster approximation, the components of polarization vector and static dielectric permittivity tensor of the crystal, as well as its piezoelectric and thermal characteristics are calculated. Influence of shear stresses, hydrostatic and uniaxial pressures on the phase transition and physical characteristics of the crystal is studied.