Charged domain wall and polar vortex topologies in a room-temperature magnetoelectric multiferroic thin film
Author(s)
Type
Journal Article
Abstract
Multiferroic topologies are an emerging solution for future low-power magnetic nanoelectronics due to their combined tuneable functionality and mobility. Here, we show that in addition to being magnetoelectric multiferroic at room temperature, thin-film Aurivillius phase Bi6TixFeyMnzO18 is an ideal material platform for both domain wall and vortex topology-based nanoelectronic devices. Utilizing atomic-resolution electron microscopy, we reveal the presence and structure of 180°-type charged head-to-head and tail-to-tail domain walls passing throughout the thin film. Theoretical calculations confirm the subunit cell cation site preference and charged domain wall energetics for Bi6TixFeyMnzO18. Finally, we show that polar vortex-type topologies also form at out-of-phase boundaries of stacking faults when internal strain and electrostatic energy gradients are altered. This study could pave the way for controlled polar vortex topology formation via strain engineering in other multiferroic thin films. Moreover, these results confirm that the subunit cell topological features play an important role in controlling the charge and spin state of Aurivillius phase films and other multiferroic heterostructures.
Date Issued
2022-02-02
Date Acceptance
2022-01-09
Citation
ACS Applied Materials and Interfaces, 2022, 14 (4), pp.5525-5536
ISSN
1944-8244
Publisher
American Chemical Society
Start Page
5525
End Page
5536
Journal / Book Title
ACS Applied Materials and Interfaces
Volume
14
Issue
4
Copyright Statement
© 2022 The Authors. Published by American Chemical Society. This work is published under CC BY 4.0 International licence.
License URL
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000745888900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Science & Technology - Other Topics
Materials Science
multiferroic
polar
domain walls
topologies
vortex
thin film
BISMUTH TITANATE
MAGNETIC-PROPERTIES
STABILITY
FERROELECTRICITY
ORDER
Publication Status
Published
Date Publish Online
2022-01-19