Rewritable ferroelectric vortex pairs in BiFeO3

Yang Li, Yaming Jin, Xiaomei Lu, Jan Chi Yang, Ying Hao Chu, Fengzhen Huang, Jinsong Zhu, Sang Wook Cheong

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Ferroelectric vortex in multiferroic materials has been considered as a promising alternative to current memory cells for the merit of high storage density. However, the formation of regular natural ferroelectric vortex is difficult, restricting the achievement of vortex memory device. Here, we demonstrated the creation of ferroelectric vortex-antivortex pairs in BiFeO3 thin films by using local electric field. The evolution of the polar vortex structure is studied by piezoresponse force microscopy at nanoscale. The results reveal that the patterns and stability of vortex structures are sensitive to the poling position. Consecutive writing and erasing processes cause no influence on the original domain configuration. The Z4 proper coloring vortex-antivortex network is then analyzed by graph theory, which verifies the rationality of artificial vortex-antivortex pairs. This study paves a foundation for artificial regulation of vortex, which provides a possible pathway for the design and realization of non-volatile vortex memory devices and logical devices.

Original languageEnglish
Article number47
Journalnpj Quantum Materials
Volume2
Issue number1
DOIs
Publication statusPublished - 2017 Dec 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Li, Y., Jin, Y., Lu, X., Yang, J. C., Chu, Y. H., Huang, F., Zhu, J., & Cheong, S. W. (2017). Rewritable ferroelectric vortex pairs in BiFeO3 npj Quantum Materials, 2(1), [47]. https://doi.org/10.1038/s41535-017-0047-2