@article{1ff87c2ddba34d3d84f0f2d5d4f468e0,
title = "Polarization Rotation at Morphotropic Phase Boundary in New Lead-Free Na1/2Bi1/2V1-xTi xO3 Piezoceramics",
abstract = "In this work, we show that polarization rotation enhances the piezoresponse in a high-performance lead-free piezoelectric material, Na1/2Bi1/2V1-xTixO3, a solid solution between tetragonal Na1/2Bi1/2VO3 and rhombohedral Na1/2Bi1/2TiO3, obtained by high-pressure synthesis. The system forms a pure perovskite structure with a favorable morphotropic phase boundary (MPB) located around x = 0.90, which separates the tetragonal and rhombohedral phases. In addition, a distinct monoclinic phase with polarization rotation as functions of composition and temperature is observed. XRD measurements revealed the moderately high Curie temperature of 523 K at x = 0.95 in the MPB. The piezoelectric coefficient d33 of the monoclinic x = 0.95 sample, 42 pC/N, is higher than those of the tetragonal and rhombohedral phases. Even though the present lead-free Na1/2Bi1/2V1-xTixO3 ceramics feature smaller d33 values compared to many currently available lead-free piezoelectric materials as a result of insufficient poling and low density, we expect our findings open up opportunities for exploring promising lead-free piezoelectric materials in Na1/2Bi1/2VO3-based perovskites.",
keywords = "ferroelectricity, lead-free, perovskite, piezoelectric, polarization rotation",
author = "Zhao Pan and Zhang, {Mao Hua} and Takumi Nishikubo and Yuki Sakai and Hajime Yamamoto and Hajime Hojo and Masayuki Fukuda and Lei Hu and Hayato Ishizaki and Satoru Kaneko and Shogo Kawaguchi and Jurij Koruza and J{\"u}rgen R{\"o}del and Masaki Azuma",
note = "Funding Information: This work was partially supported by Grants-in-Aids for Scientific Research JP18H05208 and JP19H05625 from the Japan Society for the Promotion of Science (JSPS), the Kanagawa Institute of Industrial Science and Technology, and the Hessian State Ministry for Higher Education, Research and the Arts under the LOEWE collaborative project {"}FLAME{"}. The synchrotron radiation experiments were performed at SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (2018B1860, 2019A1045, and 2020A0589). Funding Information: This work was partially supported by Grants-in-Aids for Scientific Research JP18H05208 and JP19H05625 from the Japan Society for the Promotion of Science (JSPS), the Kanagawa Institute of Industrial Science and Technology, and the Hessian State Ministry for Higher Education, Research and the Arts under the LOEWE collaborative project “FLAME”. The synchrotron radiation experiments were performed at SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (2018B1860, 2019A1045, and 2020A0589). Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",
year = "2021",
month = feb,
day = "3",
doi = "10.1021/acsami.0c18482",
language = "English",
volume = "13",
pages = "5208--5215",
journal = "ACS Applied Materials and Interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "4",
}