Multistep stochastic mechanism of polarization reversal in orthorhombic ferroelectrics

Y. A. Genenko*, M. H. Zhang, I. S. Vorotiahin, R. Khachaturyan, Y. X. Liu, J. W. Li, K. Wang, J. Koruza

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A stochastic model of electric-field-driven polarization reversal in orthorhombic ferroelectrics is advanced, providing a description of their temporal electromechanical response. The theory accounts for all possible parallel and sequential switching events. Application of the model to the simultaneous measurements of polarization and strain kinetics in a lead-free orthorhombic (K,Na)NbO3-based ferroelectric ceramic over a wide timescale of seven orders of magnitude allowed identification of preferable polarization switching paths, fractions of individual switching processes, and their activation fields. Particularly, the analysis revealed substantial contributions of coherent non-180° switching events, which do not cause macroscopic strain and thus mimic 180° switching processes.

Original languageEnglish
Article number184106
JournalPhysical Review B
Volume104
Issue number18
DOIs
Publication statusPublished - 1 Nov 2021
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fields of Expertise

  • Advanced Materials Science

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