Effects of unequally biaxial misfit strains on polarization phase diagrams in embedded ferroelectric thin layers: Phase field simulations

Ping Li Liu, Jie Wang, Tong Yi Zhang, Yulan Li, Long Qing Chen, Xing Qiao Ma, Wu Yang Chu, Li Jie Qiao

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Abstract

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.

Original languageEnglish (US)
Article number132908
JournalApplied Physics Letters
Volume93
Issue number13
DOIs
StatePublished - Oct 13 2008

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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