Journal Article

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

Hu, Chengpeng, Zhou, Zhen, Li, Jing-Feng, Zhang, Mao-Hua, Xi, Xiao-Qing, Wang, Ke, Thong, Hao-Cheng, Liu, Yi Xuan, Xu, Xing-Yu, Tian, Hao

2020

Overview

Polarization switching in lead-free (K 0.40 Na 0.60 )NbO 3 (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.

• Publisher: Tsinghua University Press,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
• Subject: (K0.40Na0.60)NbO3 (KNN) / Amplitudes / Ceramics / Characterization and Evaluation of Materials / Chemistry and Materials Science / Composites / Crystals / Domains / Electric fields / ferroelectric domain / Glass / Hysteresis loops / Lead free / Linear polarization / Materials Science / Nanotechnology / Natural Materials / Niobates / Piezoelectric crystals / Piezoelectricity / piezoelectrics / Research Article / Single crystals / Structural Materials / Switching / switching spectroscopy piezoresponse force microscopy (SS-PFM)