Strain Phase Diagram and Domain Orientation inThin Films
- 2 May 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 94 (17), 176101
- https://doi.org/10.1103/physrevlett.94.176101
Abstract
thin films were used as a model system to study the effects of strain and epitaxial constraint on structural phase transitions of perovskite films. The basic phenomena revealed will apply to a variety of important structural transitions including the ferroelectric transition. Highly strained films were grown on different substrates, providing both compressive and tensile strain. The measured strain-temperature phase diagram is qualitatively consistent with theory; however, the increase in the phase transition temperature is much larger than predicted. Because of the epitaxial strain and substrate clamping, the lattice is tetragonal at all temperatures. The phase transitions involve only changes in internal symmetry. The low temperature phase under tensile strain has a unique structure with orthorhombic space group but a tetragonal lattice, an interesting consequence of epitaxial constraint.
Keywords
This publication has 15 references indexed in Scilit:
- Structural phase transition in epitaxial perovskite filmsPhysical Review B, 2004
- Enhancement of Ferroelectricity in Strained BaTiO 3 Thin FilmsScience, 2004
- Room-temperature ferroelectricity in strained SrTiO3Nature, 2004
- Epitaxial Strain and Superconductivity inThin FilmsPhysical Review Letters, 2002
- Strain-induced tuning of metal–insulator transition in NdNiO3Applied Physics Letters, 2002
- Phase transitions and strain-induced ferroelectricity inepitaxial thin filmsPhysical Review B, 2000
- Strain and oxygenation effects on superconductivity of La1.85Sr0.15CuO4 thin filmsApplied Physics Letters, 1999
- Doubling the critical temperature of La1.9Sr0.1CuO4 using epitaxial strainNature, 1998
- Increase in the superconducting transition temperature by anisotropic strain effect in (001) La1.85Sr0.15CuO4 thin films on LaSrAlO4 substratesPhysica C: Superconductivity and its Applications, 1997
- Characteristic Structural Phase Transition in Perovskite-Type CompoundsPhysical Review Letters, 1968