Avalanches from charged domain wall motion in BaTiO3 during ferroelectric switching
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 ava...
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| Veröffentlicht in: | APL materials 2020-01, Vol.8 (1), p.011105-011105-5, Article 011105 |
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| container_end_page | 011105-5 |
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| creator | Casals, Blai Nataf, Guillaume F. Pesquera, David Salje, Ekhard K. H. |
| description | 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. |
| doi_str_mv | 10.1063/1.5128892 |
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| subjects | Materials Science Materials Science, Multidisciplinary Nanoscience & Nanotechnology Physical Sciences Physics Physics, Applied Science & Technology Science & Technology - Other Topics Technology |
| title | Avalanches from charged domain wall motion in BaTiO3 during ferroelectric switching |
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