Ge, Wanbing, Beanland, Richard, Alexe, Marin, Ramasse, Quentin and Sánchez, Ana M. (2023) 180° head-to-head flat domain walls in single crystal BiFeO3. Microstructures, 3 . 2023026. doi:10.20517/microstructures.2023.13 ISSN 2770-2995.
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Abstract
We investigate flux-grown BiFeO3 crystals using transmission electron microscopy. This material has an intriguing ferroelectric structure of domain walls with a period of ~100 nm, alternating between flat and sawtooth morphologies. We show that all domain walls are of 180° type and that the flat walls, lying on (112) planes, are reconstructed with an excess of Fe and deficiency of Bi. This reconstruction is similar to that observed in several previous studies of deposited layers of BiFeO3. The negative charge of the reconstructed layer induces head-to-head polarisation in the surrounding material, as well as a rigid-body shift of one domain relative to the other. These characteristics pin the flat 180° domain walls, as well as determining the domain structure of the material. Sawtooth 180° domain walls provide the necessary reversal of polarization between flat walls. The high density of immobile domain walls suppresses the ferroelectric properties of the material, highlighting the need for careful control of growth conditions.
| Item Type: | Journal Article |
|---|---|
| Alternative Title: | |
| Subjects: | Q Science > QC Physics T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics |
| Library of Congress Subject Headings (LCSH): | Bismuth ores , Ferroelectric crystals, Domain structure |
| Journal or Publication Title: | Microstructures |
| Publisher: | OAE Publishing Inc. |
| ISSN: | 2770-2995 |
| Official Date: | 12 June 2023 |
| Dates: | Date Event 12 June 2023 Published 12 May 2023 Accepted 30 April 2023 Submitted |
| Volume: | 3 |
| Article Number: | 2023026 |
| DOI: | 10.20517/microstructures.2023.13 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Open Access (Creative Commons open licence) |
| Date of first compliant deposit: | 10 May 2023 |
| Date of first compliant Open Access: | 10 May 2023 |
| RIOXX Funder/Project Grant: | Project/Grant ID RIOXX Funder Name Funder ID EP/R513374/1 [EPSRC] Engineering and Physical Sciences Research Council |
| Related URLs: | |
| URI: | https://wrap.warwick.ac.uk/173964/ |
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