Fixed Volume Effect on Polar Properties and Phase Diagrams of Ferroelectric Semi-ellipsoidal Nanoparticles

TL;DR

This paper theoretically investigates how fixing the volume of semi-ellipsoidal ferroelectric nanoparticles influences their polarization, phase diagrams, and properties, offering insights for optimizing nanoparticle performance in industrial applications.

Contribution

It introduces a theoretical framework combining Landau-Ginzburg-Devonshire phenomenology with electrostatics and elasticity to analyze fixed-volume effects on ferroelectric nanoparticles.

Findings

Size effects on phase diagrams depend nontrivially on volume V.

Polarization behavior is significantly influenced by fixed volume.

Results suggest pathways to optimize nanoparticle properties by volume control.

Abstract

For advanced applications in modern industry it is very important to reduce the volume of ferroelectric nanoparticles without serious deterioration of their polar properties. In many practically important cases fixed volume (rather than fixed size) corresponds to realistic technological conditions of nanoparticles fabrication. The letter is focused on the theoretical study of the behavior of ferroelectric polarization, paramagnetoelectric coefficient and phase diagrams of semi-ellipsoidal nanoparticles with fixed volume V. Our approach combines the Landau-Ginzburg-Devonshire phenomenology, classical electrostatics and elasticity theory. Our results show that the size effects of the phase diagrams and polarization of semi-ellipsoidal BiFeO3 nanoparticles nontrivially depends on V. These findings provide a path to optimize the polar properties of nanoparticles by controlling their phase diagrams at a fixed volume.