http://hdl.handle.net/20.500.12128/18717
Tytuł: | In Situ Observation of Point-Defect-Induced Unit-Cell-WiseEnergy Storage Pathway in Antiferroelectric PbZrO3 |
Autor: | Wei, Xian-Kui Jia, Chun-Lin Roleder, Krystian Dunin-Borkowski, Rafał E. Mayer, Joachim |
Słowa kluczowe: | charged domain walls; energy storage; ferrodistortive transition; in situ transmission electron microscopy; PbZrO3 |
Data wydania: | 2021 |
Źródło: | "Advanced Functional Materials", 14 Jan 2021, art. no. 2008609, s. 1-7 |
Abstrakt: | Phase transition is established to govern electrostatic energy storage for antiferroelectric (AFE)-type dielectric capacitors. However, the source of inducing the phase transition and the pathway of storing the energy remains elusive so far given the ultrafast charging/discharging process under normal working conditions. Here, by slowing down the phase-transition speed using electronbeam irradiation as an external stimulus, the in situ dynamic energy-storage process in AFE PbZrO3 is captured by using atomic-resolution transmission electron microscopy. Specifically, it is found that oxygen-lead-vacancy-induced defect core acts as a seed to initiate the antiferrodistortive-to-ferrodistortive transition in antiparallel-Pb-based structural frames. Associated with polarity evolution of the compressively strained defect core, the ferroelectric (FE)– ferrodistortive state expands bilaterally along the b-axis direction and then develops into charged domain configurations during the energy-storage process, which is further evidenced by observations at the ordinary FE states. With filling the gap of perception, the findings here provide a straightforward approach of unveiling the unit-cell-wise energy storage pathway in chemical defect-engineered dielectric ceramics. |
URI: | http://hdl.handle.net/20.500.12128/18717 |
DOI: | 10.1002/adfm.202008609 |
ISSN: | 1616-301X 1616-3028 |
Pojawia się w kolekcji: | Artykuły (WNP) |
Plik | Opis | Rozmiar | Format | |
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Roleder_In Situ Observation.pdf | 4,14 MB | Adobe PDF | Przejrzyj / Otwórz |
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