Nonlinear electric field dependence of the transverse piezoelectric response in a (001) ferroelectric film

A non-linearly decreasing piezoelectric coefficient with an external electric field is an intrinsic property of a fully poled ferroelectric film, which has been observed in the measured longitudinal piezoelectric responses. However, for transverse piezoelectric responses, the observed converse piezo...

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Bibliographic Details
Published in:Scripta materialia 2020-12, Vol.189, p.84-88
Main Authors: Wang, Yingying, Cheng, Hongbo, Yan, Jing, Chen, Ning, Yan, Peng, Ouyang, Jun
Format: Article
Language:English
Subjects:
Ferroelectric materials
Microelectromechanical systems (MEMS)
Piezoelectricity
Thin films
Transverse piezoelectric coefficient (e31,f)
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Summary:A non-linearly decreasing piezoelectric coefficient with an external electric field is an intrinsic property of a fully poled ferroelectric film, which has been observed in the measured longitudinal piezoelectric responses. However, for transverse piezoelectric responses, the observed converse piezoelectric coefficients (e31,f) have displayed a different trend. Here we show that this disagreement can be rationally resolved by utilizing a small field e31,f test under a sweeping direct current bias voltage, in which the field-dependent transverse piezoelectric response of a (001)-film is analyzed in a stepwise manner. Understanding of this nonlinear field-dependence will help improve the design of transverse piezoelectric devices. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2020.08.006