PHASE TRANSFORMATION CHARACTERISTICS OF BARIUM STRONTIUM TITANATE FILMS ON ANISOTROPIC SUBSTRATES WITH (001)//(001) EPITAXY
Abstract:The role of anisotropic misfit strains on the spontaneous polarization of (100) oriented Ba0.6Sr0.4TiO3 thin films on (100) orthorhombic substrates is theoretically analyzed. A modified thermodynamic model is utilized to evaluate the equilibrium polarization values as a function of the anisotropic misfit strains. Results show that ferroelectric phases that cannot be observed in single-crystal Ba0.6Sr0.4TiO3 can be stabilized due to the reduction in the symmetry induced by the anisotropic strain state.
Document Type: Research Article
Affiliations: 1: Materials Science & Engineering Program, CMBE Department & Institute of Materials Science, University of Connecticut, Storrs, CT, USA 2: Max Planck Institute for Microstructure Physics, Weinberg, Halle-Saale, Germany
Publication date: 2008-01-01