Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2975161
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Funding
- National Natural Science Foundation of China [50572006, 50632010, 50571011, 50428101]
- HKUST Fok Ying Tung Graduate School [NRC06/07.EG04]
- (U.S.) Department of Energy [DE-FG02-07ER46417]
- U.S. Department of Energy (DOE) [DE-FG02-07ER46417] Funding Source: U.S. Department of Energy (DOE)
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Phase field simulations were conducted to investigate the effects of unequally biaxial misfit strains on domain stability diagrams and equilibrium domain structures in an epitaxial ferroelectric PbTiO3 thin layer, which is sandwiched in a nonferroelectric medium. The simulations reveal a multidomain structure in the layer and allow constructing misfit strain-misfit strain and temperature-misfit strain phase diagrams. It is found that unequally biaxial misfit strains may lead to the presence of a single tetragonal variant, either a-domains or b-domains, which do not exist if the misfit strains are equally biaxial. (C) 2008 American Institute of Physics.
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