title: Enhanced Piezoelectric Response due to Polarization Rotation in Cobalt-Substituted BiFeO3Epitaxial Thin Films.
abstract: Polarization rotation induced by an external electric field in piezoelectric materials such as PbZr1-xTixO3is generally regarded as the origin of their large piezoelectric responses. Here, the piezoelectric responses of high-quality cobalt-substituted BiFeO3epitaxial thin films with monoclinic distortions are systematically examined. It is demonstrated that polarization rotation plays a crucial role in improving the piezoelectric responses in this material.
authors.affiliation: Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta, Yokohama, 226-8503, Japan.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Shimizu
authors.affiliation: Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta, Yokohama, 226-8503, Japan. hhojo@msl.titech.ac.jp.
authors.forename: Hajime
authors.initials: H
authors.lastname: Hojo
authors.affiliation: Institute of Engineering Innovation, University of Tokyo, Yayoi, Bunkyo, 113-8656, Japan.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Ikuhara
authors.affiliation: Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta, Yokohama, 226-8503, Japan. mazuma@msl.titech.ac.jp.
authors.forename: Masaki
authors.initials: M
authors.lastname: Azuma
keywords: bismuth ferrite; piezoelectric materials; polarization rotation