Probing Metastable Domain Dynamics <i>via</i> Automated Experimentation in Piezoresponse Force Microscopy.
basic_science · Level V
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- Record sourced from PubMed, PMID 34495651.
- Also identified by DOI 10.1021/acsnano.1c05455.
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Abstract
The dynamics of complex topological defects in ferroelectric materials is explored using automated experimentation in piezoresponse force microscopy. Specifically, a complex trigger system (<i>i.e.</i>, "FerroBot") is employed to study metastable domain-wall dynamics in Pb<sub>0.6</sub>Sr<sub>0.4</sub>TiO<sub>3</sub> thin films. Several regimes of superdomain wall dynamics have been identified, including smooth domain-wall motion and significant reconfiguration of the domain structures. We have further demonstrated that microscopic mechanisms of the domain-wall dynamics can be identified; <i>i.e.</i>, domain-wall bending can be separated from irreversible domain reconfiguration regimes. In conjunction, phase-field modeling was used to corroborate the observed mechanisms. As such, the observed superdomain dynamics can provide a model system for classical ferroelectric dynamics, much like how colloidal crystals provide a model system for atomic and molecular systems.