%0 Journal Article
%K phase transitions
%K piezoelectricity
%K Piezoelectric response
%K Piezoelectric property
%K Landau-Devonshire theory
%K Misfit strains
%K Mixed structure
%K Orthorhombic phasis
%K Single domains
%A C.W Huang
%A Y.H Chu
%A Z.H Chen
%A J Wang
%A T Sritharan
%A Q He
%A Ramamoorthy Ramesh
%A L Chen
%B Applied Physics Letters
%D 2010
%G eng
%R 10.1063/1.3499658
%T Strain-driven phase transitions and associated dielectric/piezoelectric anomalies in BiFeO3 thin films
%V 97
%X Strain-driven phase transitions and related intrinsic polarization, dielectric, and piezoelectric properties for single-domain films were studied for BiFeO3 using phenomenological Landau-Devonshire theory. A stable and mixed structure between tetragonal and rhombohedral-like (monoclinic) phases is predicted at a compressive misfit strain of um =-0.0382 without an energy barrier. For a tensile misfit strain of um =0.0272, another phase transition between the monoclinic and orthorhombic phases was predicted with sharply high dielectric and piezoelectric responses. © 2010 American Institute of Physics.