3D polarization texture of a symmetric 4-fold flux closure domain in strained ferroelectric PbTiO3 films

Y. L. Tang, Y. L. Zhu, Z. J. Hong, E. A. Eliseev, A. N. Morozovska, Y. J. Wang, Y. Liu, Y. B. Xu, B. Wu, L. Q. Chen, S. J. Pennycook, X. L. Ma

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Abstract

Although the strong coupling of polarization to spontaneous strain in ferroelectrics would impart a flux-closure with severe disclination strains, recent studies have successfully stabilized such a domain via a nano-scaled multi-layer growth. Nonetheless, the detailed distributions of polarizations in three-dimensions (3D) and how the strains inside a flux closure affect the structures of domain walls are still less understood. Here we report a 3D polarization texture of a 4-fold flux closure domain identified in tensile strained ferroelectric PbTiO3/SrTiO3 multilayer films. Ferroelectric displacement analysis based on aberration-corrected scanning transmission electron microscopic imaging reveals highly inhomogeneous strains with strain gradient above 107/m. These giant disclination strains significantly broaden the 90° domain walls, while the flexoelectric coupling at 180° domain wall is less affected. The present observations are helpful for understanding the basics of topological dipole textures and indicate novel applications of ferroelectrics through engineering strains.

Original languageEnglish (US)
Pages (from-to)957-967
Number of pages11
JournalJournal of Materials Research
Volume32
Issue number5
DOIs
StatePublished - Mar 14 2017

All Science Journal Classification (ASJC) codes

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

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    Tang, Y. L., Zhu, Y. L., Hong, Z. J., Eliseev, E. A., Morozovska, A. N., Wang, Y. J., Liu, Y., Xu, Y. B., Wu, B., Chen, L. Q., Pennycook, S. J., & Ma, X. L. (2017). 3D polarization texture of a symmetric 4-fold flux closure domain in strained ferroelectric PbTiO3 films. Journal of Materials Research, 32(5), 957-967. https://doi.org/10.1557/jmr.2016.259