Electro-optical effect and optical absorption in (K,Na)NbO3-based piezoceramics

The intriguing coupling interactions between photochromism and ferroelectric polarization were firstly observed in Sm doped (K0.5Na0.5)NbO3 piezoceramics. After 407 nm irradiation, the maximum polarization (Pmax) and remanent polarization (Pr) intensities were dramatically decreased, whereas the coe...

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Bibliographic Details
Published in:Scripta materialia 2020-03, Vol.178, p.398-401
Main Authors: Sun, Haiqin, Jia, Qiannan, Li, Yong, Zhang, Qiwei, Hao, Xihong
Format: Article
Language:English
Subjects:
Electro-optical effects
Optical absorption
Piezoelectric ceramics
Piezoelectricity
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Summary:The intriguing coupling interactions between photochromism and ferroelectric polarization were firstly observed in Sm doped (K0.5Na0.5)NbO3 piezoceramics. After 407 nm irradiation, the maximum polarization (Pmax) and remanent polarization (Pr) intensities were dramatically decreased, whereas the coercive field, leakage current and photocurrent showed the remarkable increase. The variations of the polarization and photocurrent can be reversibly converted by alternating light irradiation and thermal stimulus, suggesting good polarization switching performance. This work provides a new route to effectively modulate ferro-/piezoelectric and photocurrent properties of ferroelectric materials by the non-contact remote control of light. (K,Na)NbO3-based piezoceramics exhibited the photochromism-induced macroscopic polarization switching performance. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2019.12.011