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Ferroelectric polarization and magnetic structure at domain walls in a multiferroic film

Author

Listed:
  • Ang Tao

    (Chinese Academy of Sciences
    University of Science and Technology of China
    Jihua Lab)

  • Yixiao Jiang

    (Chinese Academy of Sciences
    Jihua Lab)

  • Shanshan Chen

    (Chinese Academy of Sciences
    University of Science and Technology of China
    Jihua Lab)

  • Yuqiao Zhang

    (Jiangsu University
    Foshan (Southern China) Institute for New Materials)

  • Yi Cao

    (Chinese Academy of Sciences
    University of Science and Technology of China)

  • Tingting Yao

    (Chinese Academy of Sciences
    Jihua Lab)

  • Chunlin Chen

    (Chinese Academy of Sciences
    Jihua Lab)

  • Hengqiang Ye

    (Jihua Lab)

  • Xiu-Liang Ma

    (Chinese Academy of Sciences
    Songshan Lake Materials Laboratory
    Chinese Academy of Sciences)

Abstract

Domain walls affect significantly ferroelectric and magnetic properties of magnetoelectric multiferroics. The stereotype is that the ferroelectric polarization will reduce at the domain walls due to the incomplete shielding of depolarization field or the effects of gradient energy. By combining transmission electron microscopy and first-principles calculations, we demonstrate that the ferroelectric polarization of tail-to-tail 180° domain walls in ε-Fe2O3 is regulated by the bound charge density. A huge enhancement (43%) of ferroelectric polarization is observed in the type I domain wall with a low bound charge density, while the ferroelectric polarization is reduced to almost zero at the type II domain wall with a high bound charge density. The magnetic coupling across the type I and type II ferroelectric domain walls are antiferromagnetic and ferromagnetic, respectively. Revealing mechanisms for enhancing ferroelectric polarization and magnetic behaviors at ferroelectric domain walls may promote the fundamental research and potential applications of magnetoelectric multiferroics.

Suggested Citation

  • Ang Tao & Yixiao Jiang & Shanshan Chen & Yuqiao Zhang & Yi Cao & Tingting Yao & Chunlin Chen & Hengqiang Ye & Xiu-Liang Ma, 2024. "Ferroelectric polarization and magnetic structure at domain walls in a multiferroic film," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50431-9
    DOI: 10.1038/s41467-024-50431-9
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    References listed on IDEAS

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    1. Peng Gao & Jason Britson & Jacob R. Jokisaari & Christopher T. Nelson & Seung-Hyub Baek & Yiran Wang & Chang-Beom Eom & Long-Qing Chen & Xiaoqing Pan, 2013. "Atomic-scale mechanisms of ferroelastic domain-wall-mediated ferroelectric switching," Nature Communications, Nature, vol. 4(1), pages 1-9, December.
    2. Keith P. McKenna & Florian Hofer & Daniel Gilks & Vlado K. Lazarov & Chunlin Chen & Zhongchang Wang & Yuichi Ikuhara, 2014. "Atomic-scale structure and properties of highly stable antiphase boundary defects in Fe3O4," Nature Communications, Nature, vol. 5(1), pages 1-8, December.
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