http://hdl.handle.net/20.500.12128/12732
Tytuł: | An Unconventional Transient Phase with Cycloidal Order of Polarization in Energy-Storage Antiferroelectric PbZrO3 |
Autor: | Wei, Xian-Kui Jia, Chun-Lin Du, Hong-Chu Roleder, Krystian Mayer, Joachim Dunin-Borkowski, Rafał E. |
Słowa kluczowe: | cycloidal polarization; energy storage; ferrodistortive phase; PbZrO3; phase transition |
Data wydania: | 24-sty-2020 |
Źródło: | Advanced Materials, 24 Jan 2020, Art. No. 1907208 |
Abstrakt: | Antiferroelectric-based dielectric capacitors are receiving tremendous attention for their outstanding energy-storage performance and extraordinary flexibility in collecting pulsed powers. Nevertheless, the in situ atomic-scale structuralevolution pathway, inherently coupling to the energy storage process, has not been elucidated for the ultimate mechanistic understanding so far. Here, timeand atomic-resolution structural phase evolution in antiferroelectric PbZrO3 during storage of energy from the electron-beam illumination is reported. By employing state-of-the-art negative-spherical-aberration imaging technique, the quantitative transmission electron microscopy study presented herein clarifies that the hierarchical evolution of polar oxygen octahedra associated with the unit-cell volume change and polarization rotation accounts for the stepwise antiferroelectric-to-ferroelectric phase transition. In particular, an unconventional ferroelectric category—the ferrodistortive phase characteristic of a unique cycloidal polarization order—is established during the dynamic structure investigation. Through clarifying the atomic-scale phase transformation pathway, findings of this work unveil a new territory to explore novel ferrodistortive phases in energy-storage materials with the nonpolar-to-polar phase transitions. |
URI: | http://hdl.handle.net/20.500.12128/12732 |
DOI: | 10.1002/adma.201907208 |
ISSN: | 0935-9648 1521-4095 |
Pojawia się w kolekcji: | Artykuły (WNŚiT) |
Plik | Opis | Rozmiar | Format | |
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Wei_An_unconventional_transient_phase.pdf | 1,62 MB | Adobe PDF | Przejrzyj / Otwórz |
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