Domain structures and phase diagram in 2D ferroelectrlcs under applied biaxial strains - Phase field simulations and thermodynamic calculations

Jie Wang, Yulan Li, Long-qing Chen, Tong Yi Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The microscopic domain structures in 2D ferroelectrics under applied biaxial strains are investigated using a phase field model based on the time-dependent Ginzburg-Landau equation that takes both long-range electric and -elastic interactions into account, The stable polarization patterns are simulated at different temperatures and applied inequiaxial strains. The results show that the ferroelectrics transfer from multi-domain state to single-domain state when temperature surpasses a critical value, On the other hand, the macroscopic equilibrium polarization states are also studied through a nonlinear thermodynamic theory. The corresponding transition from a1a 2 state (P1 ≠ 0, P2 ≠ 0) to a1 state (P1 ≠ 0, P2 = 0) or a2 state (P 2 ≠ 0, P1 = 0) is also found from the "strain-strain-temperature" phase diagram, which is constructed by minimizing Helmholtz free energy.

Original languageEnglish (US)
Title of host publicationCoupled Nonlinear Phenomena
Subtitle of host publicationModeling and Simulation for Smart, Ferroic, and Multiferroic Materials
Pages137-142
Number of pages6
StatePublished - Dec 1 2005
Event2005 MRS Spring Meeting - San Francisco, CA, United States
Duration: Mar 28 2005Apr 1 2005

Publication series

NameMaterials Research Society Symposium Proceedings
Volume881
ISSN (Print)0272-9172

Other

Other2005 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period3/28/054/1/05

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Wang, J., Li, Y., Chen, L., & Zhang, T. Y. (2005). Domain structures and phase diagram in 2D ferroelectrlcs under applied biaxial strains - Phase field simulations and thermodynamic calculations. In Coupled Nonlinear Phenomena: Modeling and Simulation for Smart, Ferroic, and Multiferroic Materials (pp. 137-142). (Materials Research Society Symposium Proceedings; Vol. 881).