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Electrical and mechanical switching of ferroelectric polarization in the 70 nm BiFeO3 film.
Sci Rep 2016; 6:19092SR

Abstract

Ferroelectric polarization switching and its domain evolution play a key role on the macroscopic electric properties of ferroelectric or piezoelectric devices. Mechanical switching has been reported recently in ~5 nm BaTiO3 and PbZr0.2Ti0.8O3 epitaxial films; however it is still a challenge for a mechanical force to switch polarization of a slightly thicker film in the same way as an electric field. Here, we report that the polarization of a 70 nm BiFeO3 epitaxial film can be completely switched by a mechanical force, and its domain evolution is similar to that observed with electrical switching. With the gradual increase of the field/force, new domains nucleate preferentially at domain boundaries, the μm-size domains commonly decompose to a mass of nm-size domains, and finally they may reorganize to μm-size domains which undergo 180(°) polarization switching through multi steps. Importantly, the complete mechanical switching of polarization was also established in the (0 0 1) film with a smooth surface. Furthermore, either upward or downward polarization can be read out nondestructively by a constant current. Our study sheds light on prospective applications of ferroelectrics in the absence of an electric field, such as memory devices and other micro-electromechanical systems.

Authors+Show Affiliations

School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Yu Tian Road 500, Shanghai 200083, P. R. China.School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P. R. China.National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P. R. China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26752105

Citation

Chen, Liufang, et al. "Electrical and Mechanical Switching of Ferroelectric Polarization in the 70 Nm BiFeO3 Film." Scientific Reports, vol. 6, 2016, p. 19092.
Chen L, Cheng Z, Xu W, et al. Electrical and mechanical switching of ferroelectric polarization in the 70 nm BiFeO3 film. Sci Rep. 2016;6:19092.
Chen, L., Cheng, Z., Xu, W., Meng, X., Yuan, G., Liu, J., & Liu, Z. (2016). Electrical and mechanical switching of ferroelectric polarization in the 70 nm BiFeO3 film. Scientific Reports, 6, p. 19092. doi:10.1038/srep19092.
Chen L, et al. Electrical and Mechanical Switching of Ferroelectric Polarization in the 70 Nm BiFeO3 Film. Sci Rep. 2016 Jan 11;6:19092. PubMed PMID: 26752105.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrical and mechanical switching of ferroelectric polarization in the 70 nm BiFeO3 film. AU - Chen,Liufang, AU - Cheng,Zhihao, AU - Xu,Wenting, AU - Meng,Xiangjian, AU - Yuan,Guoliang, AU - Liu,Junming, AU - Liu,Zhiguo, Y1 - 2016/01/11/ PY - 2015/07/02/received PY - 2015/09/28/accepted PY - 2016/1/12/entrez PY - 2016/1/12/pubmed PY - 2016/1/12/medline SP - 19092 EP - 19092 JF - Scientific reports JO - Sci Rep VL - 6 N2 - Ferroelectric polarization switching and its domain evolution play a key role on the macroscopic electric properties of ferroelectric or piezoelectric devices. Mechanical switching has been reported recently in ~5 nm BaTiO3 and PbZr0.2Ti0.8O3 epitaxial films; however it is still a challenge for a mechanical force to switch polarization of a slightly thicker film in the same way as an electric field. Here, we report that the polarization of a 70 nm BiFeO3 epitaxial film can be completely switched by a mechanical force, and its domain evolution is similar to that observed with electrical switching. With the gradual increase of the field/force, new domains nucleate preferentially at domain boundaries, the μm-size domains commonly decompose to a mass of nm-size domains, and finally they may reorganize to μm-size domains which undergo 180(°) polarization switching through multi steps. Importantly, the complete mechanical switching of polarization was also established in the (0 0 1) film with a smooth surface. Furthermore, either upward or downward polarization can be read out nondestructively by a constant current. Our study sheds light on prospective applications of ferroelectrics in the absence of an electric field, such as memory devices and other micro-electromechanical systems. SN - 2045-2322 UR - https://www.unboundmedicine.com/medline/citation/26752105/Electrical_and_mechanical_switching_of_ferroelectric_polarization_in_the_70_nm_BiFeO3_film_ L2 - http://dx.doi.org/10.1038/srep19092 DB - PRIME DP - Unbound Medicine ER -