Home > Publications database > In Situ Observation of Point‐Defect‐Induced Unit‐Cell‐Wise Energy Storage Pathway in Antiferroelectric PbZrO 3 > print

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024 7 _ |a 10.1002/adfm.202008609
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024 7 _ |a 1616-301X
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082 _ _ |a 530
100 1 _ |a Wei, Xiankui
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245 _ _ |a In Situ Observation of Point‐Defect‐Induced Unit‐Cell‐Wise Energy Storage Pathway in Antiferroelectric PbZrO 3
260 _ _ |a Weinheim
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520 _ _ |a 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 electron‐beam 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.
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700 1 _ |a Dunin-Borkowski, Rafal
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700 1 _ |a Mayer, Joachim
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773 _ _ |a 10.1002/adfm.202008609
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856 4 _ |u https://juser.fz-juelich.de/record/889794/files/Wei_In-situ%20Oberservation.pdf
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856 4 _ |u https://juser.fz-juelich.de/record/889794/files/adfm.202008609.pdf
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