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- Title
Direct Observation of Ferroelectric Domain Walls in LiNbO<sub>3</sub>: Wall-Meanders, Kinks, and Local Electric Charges.
- Authors
Gonnissen, Julie; Batuk, Dmitry; Nataf, Guillaume F.; Jones, Lewys; Abakumov, Artem M.; Van Aert, Sandra; Schryvers, Dominique; Salje, Ekhard K. H.
- Abstract
Direct observations of the ferroelectric domain boundaries in LiNbO3 are performed using high-resolution high-angle annular dark field scanning transmission electron microscopy imaging, revealing a very narrow width of the domain wall between the 180° domains. The domain walls demonstrate local side-way meandering, which results in inclinations even when the overall wall orientation follows the ferroelectric polarization. These local meanders contain kinks with 'head-to-head' and 'tail-to-tail' dipolar configurations and are therefore locally charged. The charged meanders are confined to a few cation layers along the polarization direction and are separated by longer stretches of straight domain walls.
- Subjects
FERROELECTRIC domains; DOMAIN walls (Ferromagnetism); ELECTRIC charge; SCANNING transmission electron microscopy; POLARIZATION (Electricity)
- Publication
Advanced Functional Materials, 2016, Vol 26, Issue 42, p7599
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.201603489