Casals, Blai and Nataf, Guillaume F. and Pesquera, David and Salje, Ekhard K. H. (2020) Avalanches from charged domain wall motion in BaTiO3 during ferroelectric switching. APL Materials, 8 (1). 011105. ISSN 2166-532X DOI https://doi.org/10.1063/1.5128892
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Abstract
We report two methods for direct observations of avalanches in ferroelectric materials during the motion of domain walls. In the first method, we use optical imaging techniques to derive changes in domain structures under an electric field. All changes occur through small jumps (jerks) that obey avalanche statistics. In the second method, we analyze jerks by their displacement current. Both methods reveal a power law distribution with an energy exponent of 1.6, in agreement with previous acoustic emission measurements, and integrated mean field theory. This new combination of methods allows us to probe both polarization and strain variations during the motion of domain walls and can be used for a much wider class of ferroelectrics, including ceramic samples, than acoustic emission.
Item Type: | Article |
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Uncontrolled Keywords: | 2019AREP; IA76 |
Subjects: | 03 - Mineral Sciences |
Divisions: | 03 - Mineral Sciences 07 - Gold Open Access |
Journal or Publication Title: | APL Materials |
Volume: | 8 |
Page Range: | 011105 |
Identification Number: | https://doi.org/10.1063/1.5128892 |
Depositing User: | Sarah Humbert |
Date Deposited: | 24 Jan 2020 11:18 |
Last Modified: | 24 Jan 2020 11:18 |
URI: | http://eprints.esc.cam.ac.uk/id/eprint/4611 |
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