Enhanced piezoelectric response due to polarization rotation in cobalt-substituted BiFeO3 epitaxial thin film



Keisuke Shimizu,Hajime Hojo,Yuichi Ikuhara,Masaki Azuma



Polarization rotation induced by an external electric field in piezoelectric materials such as PbZr1−xTixO3 is generally regarded as the origin of their large piezoelectric responses. Here, the piezoelectric responses of high-quality cobalt-substituted BiFeO3 epitaxial thin films with monoclinic distortions are systematically examined. It is demonstrated that polarization rotation plays a crucial role in improving piezoelectric responses in this material.



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