Oxygen vacancy dipoles in strained epitaxial <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>BaTi</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math> films
M. Tyunina, Jani Peräntie, T. Kocourek, Sami Saukko, Heli Jantunen, M. Jelı́nek, A. Dejneka
Abstract
This work reveals the anisotropic formation of oxygen vacancies in barium titanate films. The substrate-induced strain favors the vacancy formation in the Ba-O planes and stabilizes the out-of-plane orientation of associated dipoles. Consequently, the authors observe new crystal structures and ferroelectric and optical properties
Topics & Concepts
FerroelectricityDipoleBarium titanateOrientation (vector space)OxygenCrystallographyMaterials scienceCondensed matter physicsPhysicsChemistryGeometryMathematicsOptoelectronicsDielectricQuantum mechanicsFerroelectric and Piezoelectric MaterialsElectronic and Structural Properties of OxidesAcoustic Wave Resonator Technologies