Tong, B.
, Wang, S.
, Wong-Ng, W.
, Zhang, X.
, Hang, C.
, Zhao, H.
and Liu, W.
(2019),
Polarization switching dynamics and switchable diode effect in hybrid improper ferroelectric Ca3Ti2O7 ceramics, Journal of the American Ceramic Society, [online], https://doi.org/10.1111/jace.16077, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=926115
(Accessed October 15, 2025)
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Polarization switching dynamics and switchable diode effect in hybrid improper ferroelectric Ca3Ti2O7 ceramics
Published
Author(s)
Baoyuan Tong, Shouyu Wang, , Xiongnan Zhang, Cong Hang, Hui Zhao, Wei Fang Liu
Abstract
Hybrid improper ferroelectricity (HIF) Ca3Ti2O7 (CTO) ceramics were synthesized by a solid- state reaction method. Their polarization switching currents, dynamic processes of polarization- switching, and leakage current properties were investigated. It was found that the dynamic polarization curves of CTO ceramics exhibit obvious dependence on the frequency of the driving electric fields. Moreover, CTO ceramics show a switchable diode effect. The underlying mechanism for the observed effects were proposed based on the interplaying between mobile charged defects and bound charges. The charged defects also lead to a decrease of the band gap of the CTO ceramic, as revealed by absorption spectrum analysis.Citation
Journal of the American Ceramic Society
Volume
102
Pub Type
Journals
Download Paper
Keywords
hybrid improper ferroelectric Ca3Ti2O7 ceramics, polarization-switching, polarization- switching, switchable diode effect, resistive switching mechanism
Citation
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Created February 7, 2019, Updated October 12, 2021