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

研究成果: Article同行評審

35 引文 斯高帕斯(Scopus)

摘要

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.

原文English
文章編號47
期刊npj Quantum Materials
2
發行號1
DOIs
出版狀態Published - 2017 十二月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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