Nonuniform States in Ferroelectrics and Antiferroelectrics. States with Negative Interphase Energy

TL;DR

This paper investigates the stability of coexisting ferroelectric and antiferroelectric phases, revealing that domain interactions can stabilize nonuniform states with negative interphase energy, affecting material behavior under external conditions.

Contribution

It provides a detailed analysis of how domain interactions stabilize nonuniform states in dipole-ordered substances with close phase energies, a novel insight into phase coexistence.

Findings

Domains of coexisting phases stabilize nonuniform states.

Interaction effects influence phase stability under external parameters.

Presence of negative interphase energy affects material properties.

Abstract

Results of detailed investigations of stability of phases in substances with the small difference in the energies of the ferroelectric and the antiferroelectric types of dipole ordering are presented. It is shown that interaction of locally separated domains of the ferroelectric and antiferroelectric phases stabilizes a nonuniform state of the samples. The analysis of physical phenomena caused by the presence of domains of coexisting ferroelectric and antiferroelectric phases in different dipole ordered substances is presented. The consideration of peculiarities of behavior of systems with nonuniform state of coexisting phases under the action of changing external thermodynamic parameters (temperature, pressure, electric field, and chemical composition) is given.