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Research Article | Open Access

Determination of polarization states in (K,Na)NbO3 lead-free piezoelectric crystal

Mao-Hua ZHANGaChengpeng HUb( )Zhen ZHOUaHao TIANbHao-Cheng THONGaYi Xuan LIUaXing-Yu XUaXiao-Qing XIaJing-Feng LIaKe WANGa( )
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Department of Physics, Harbin Institute of Technology, Harbin 150001, China
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Polarization switching in lead-free (K0.40Na0.60)NbO3 (KNN) single crystals was studied by switching spectroscopy piezoresponse force microscopy (SS-PFM). Acquisition of multiple hysteresis loops on a closely spaced square grid enables polarization switching parameters to be mapped in real space. Piezoresponse amplitude and phase hysteresis loops show collective symmetric/asymmetric characteristics, affording information regarding the switching behavior of different domains. As such, the out-of-plane polarization states of the domains, including amplitudes and phases can be determined. Our results could contribute to a further understanding of the relationships between polarization switching and polarization vectors at the nanoscale, and provide a feasible method to correlate the polarization hysteresis loops in a domain under an electric field with the polarization vector states.

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Journal of Advanced Ceramics
Pages 204-209
Cite this article:
ZHANG M-H, HU C, ZHOU Z, et al. Determination of polarization states in (K,Na)NbO3 lead-free piezoelectric crystal. Journal of Advanced Ceramics, 2020, 9(2): 204-209.








Web of Science






Received: 15 October 2019
Revised: 06 January 2020
Accepted: 06 January 2020
Published: 07 April 2020
© The author(s) 2020

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