Boundary conditions manipulation of polar vortex domains in BiFeO3 membranes via phase-field simulations

Polar vortex domains have recently become an emergent research field due to the abundant physical phenomena and potential applications in high-density memories. Here, we explore the mechanisms of creating polar vortex domains in the BiFeO3 (BFO) membranes subjected to different boundary conditions using phase-field simulations. A major difference is that the vortex in membrane can be stabilized even under short-circuit electrical boundary conditions compared to vortex in other systems, such as thin film or superlattice. We found that (a) the formation of polar vortex domains at the membrane interior under bending is mainly driven by the reduction of elastic energy under short-circuit boundary condition, and the vortex chirality (namely, clockwise and counterclockwise) could be identified by n-shape and u-shape bending; (b) in the unbent open-circuit BFO membrane case, exotic trapezoid-shaped vortex nanodomains form at the terminations of 109 degrees domain walls (DWs) and partially charged 71 degrees DWs, which is driven by the local depolarization field and the interplay among electrostatic, elastic, and gradient and Landau energies. We also examine Kittel's law by establishing the dependence of vortex periods on the membrane thickness. These results give further understanding of the effect of boundary conditions on the formation of polar vortex domains, guiding experimental designs of vortex-based high-density memories.



Work Title Boundary conditions manipulation of polar vortex domains in BiFeO3 membranes via phase-field simulations
Open Access
  1. Ren-Ci Peng
  2. Xiaoxing Cheng
  3. Bin Peng
  4. Ziyao Zhou
  5. Long-Qing Chen
  6. Ming Liu
  1. BiFeO3
  2. Ferroelectric membrane
  3. Polar vortex domains
  4. Phase-field simulations
License In Copyright (Rights Reserved)
Work Type Article
  1. Journal of Physics D: Applied Physics
Publication Date 2021
Publisher Identifier (DOI)
Deposited August 10, 2022




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Work History

Version 1

  • Created
  • Updated
  • Added Creator Sandra Elder
  • Added Boundary conditions manipulation of polar vortex domains in BiFeO<sub>3<:sub>membranes via phase-field simulations.pdf
  • Updated License Show Changes
  • Published
  • Updated Keyword, Publisher, Publisher Identifier (DOI), and 1 more Show Changes
    • BiFeO3, Ferroelectric membrane, Polar vortex domains, Phase-field simulations
    • Journal of Physics D: Applied Physics
    Publisher Identifier (DOI)
    Publication Date
    • 2021-12-09
    • 2021
  • Deleted Creator Sandra Elder
  • Added Creator Ren-Ci Peng
  • Added Creator Xiaoxing Cheng
  • Added Creator Bin Peng
  • Added Creator Ziyao Zhou
  • Added Creator Long-Qing Chen
  • Added Creator Ming Liu