The negative dielectric permittivity of polycrystalline barium titanate nanofilms under high-strength Khz-AC Fields

MR Zhang, Y Su - International Journal of Solids and Structures, 2022 - Elsevier
Unlike the conventional high-frequency dielectric behavior for which the amplitude of the
applied field is too small to cause polarization switching, the dynamically-driven polarization …

Understanding magnetoelectric switching in thin films

NS Fedorova, DE Nikonov, JM Mangeri, H Li, IA Young… - Physical Review B, 2024 - APS
In this work we use a phenomenological theory of ferroelectric switching in BiFeO 3 thin films
to uncover the mechanism of the two-step process that leads to the reversal of the weak …

[HTML][HTML] Domain size control by spinodal decomposition in ferroelectrics

CM Bishop - Acta Materialia, 2024 - Elsevier
Just as fine precipitate dispersions are sought for high yield strength in alloys, nanoscale,
mixed-phase microstructures are sought for high electromechanical performance in oxide …

[HTML][HTML] Domain pattern formation in tetragonal ferroelectric ceramics

R Indergand, X Bruant, DM Kochmann - … of the Mechanics and Physics of …, 2023 - Elsevier
We present the results of high-resolution simulations of the ferroelectric domain evolution in
polycrystalline lead zirconate titanate (PZT), using a phase-field framework that accounts for …

[HTML][HTML] Kinetics of ferroelectric switching in poled barium titanate ceramics: Effects of electrical cycling rate

V Kannan, M Trassin, DM Kochmann - Materialia, 2022 - Elsevier
Our understanding of the rate-dependent electro-mechanical response of ferroelectric
ceramics is incomplete–primarily due to limited experimental data characterizing the …

[HTML][HTML] A phase-field model for ferroelectrics with general kinetics, Part I: Model formulation

L Guin, DM Kochmann - Journal of the Mechanics and Physics of Solids, 2023 - Elsevier
When subjected to electro-mechanical loading, ferroelectrics see their polarization evolve
through the nucleation and evolution of domains. Existing mesoscale phase-field models for …

[HTML][HTML] Rate-dependent ferroelectric switching in barium titanate ceramics from modified PUND experiments

V Kannan, DM Kochmann - Extreme Mechanics Letters, 2022 - Elsevier
Predicting and controlling the rate-dependent electro-mechanical switching in ferroelectric
ceramics is challenging due to our current lack of understanding the underlying domain …

Revealing Fast Negative Capacitance in PbZr0.2Ti0.8O3 Thin Film with Acicular Ferroelastic Domains

J He, Q Chen, Y Wu, C Tan, X Zhong, H Song… - Nano Letters, 2024 - ACS Publications
Negative capacitance effects with fast response times hold great potential for reducing the
power consumption in high-frequency nanoelectronics. Nevertheless, the negative …

Strain phase diagram and physical properties of (110)-oriented PbTiO3 thin films by phase-field simulations

H Zhang, YP Feng, YJ Wang, YL Tang, YL Zhu, XL Ma - Acta Materialia, 2022 - Elsevier
Extensive studies have shown that (110)-oriented ferroelectric films exhibit unique structures
and excellent physical properties compared with (001)-oriented ferroelectric films. Showing …

Statistical correlations of random polarization and electric depolarization fields in ferroelectrics

YA Genenko, OY Mazur, LI Stefanovich - Physical Review B, 2023 - APS
A conceptual problem of the electric-field-mediated polarization correlations during a
stochastic formation of polarization domain structure in ferroelectrics is addressed by using …