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Quasipolaron Surface Polarization in Bismuth Ferrite

Jiarui Zhang1, Yongbao Cui2, Nannan Liu3, Qi Qi1, Rui Huang1, Kai Chen1,4,*, Laijun Liu2,†, Zhida Han5,‡, and Guoliang Yuan3

  • 1School of Science, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China
  • 2Guilin University of Technology, Guilin 541004, People’s Republic of China
  • 3School of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210094, People’s Republic of China
  • 4MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China
  • 5School of Electronic and Information Engineering, Changshu Institute of Technology, Changshu 215500, People’s Republic of China

  • *kai@njust.edu.cn
  • †ljliu@163.com
  • ‡han @cslg.edu.cn
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Phys. Rev. Applied 18, L051002 – Published 8 November, 2022

DOI: https://doi.org/10.1103/PhysRevApplied.18.L051002

Abstract

With the introduction of a not fully screened polarization that leads to three magnetic subdomains nested in one ferroelectric domain, we identify it as the quasipolaron surface polarization in the electrode effect of bismuth ferrite. The remanent polarization at 40 Hz is about 439 μC/cm2 in the dielectric hysteresis loop of a reverse S shape, accompanying the antiferromagnetic one of an S shape, which reveals that the surface is an indispensable part in spintronics.

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Phys. Rev. Applied 18, L051002– Published 8 November, 2022
  • Received 29 July 2022
  • Revised 21 September 2022
  • Accepted 11 October 2022
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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