%0 Journal Article %K Single crystals %K Piezoelectricity %K Ferroelectric thin films %K Microelectromechanical devices %K Barium titanate %K Lead-free %K Orientation dependences %K Piezoelectric constants %A J Ouyang %A Ramamoorthy Ramesh %A A.L Roytburd %B Applied Surface Science %D 2006 %G eng %I Elsevier %P 3394-3400 %R 10.1016/j.apsusc.2005.05.048 %T Theoretical investigation of the intrinsic piezoelectric properties for tetragonal BaTiO 3 epitaxial films %V 252