Title
Direct observation of ferroelectric domain walls in <tex>$LiNbO_{3}$</tex> : wall-meanders, kinks, and local electric charges
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Weinheim ,
Subject
Physics
Chemistry
Engineering sciences. Technology
Source (journal)
Advanced functional materials. - Weinheim
Volume/pages
26(2016) :42 , p. 7599-7604
ISSN
1616-301X
ISI
000388166700006
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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.
E-info
https://repository.uantwerpen.be/docman/iruaauth/646a16/135336.pdf
Handle