TY  - JOUR
AU  - Wei, Xian‐Kui
AU  - Jia, Chun-Lin
AU  - Du, Hongchu
AU  - Roleder, Krystian
AU  - Mayer, Joachim
AU  - Dunin-Borkowski, Rafal
TI  - An Unconventional Transient Phase with Cycloidal Order of Polarization in Energy‐Storage Antiferroelectric PbZrO 3
JO  - Advanced materials
VL  - 32
IS  - 9
SN  - 1521-4095
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2020-00515
SP  - 1907208 -
PY  - 2020
AB  - 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 structural‐evolution pathway, inherently coupling to the energy storage process, has not been elucidated for the ultimate mechanistic understanding so far. Here, time‐ and 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:31975474
UR  - <Go to ISI:>//WOS:000508922400001
DO  - DOI:10.1002/adma.201907208
UR  - https://juser.fz-juelich.de/record/873066
ER  -