Voltage-driven displacement of magnetic vortex cores

M. Ghidini*, R. Pellicelli, R. Mansell, D. Pesquera, B. Nair, X. Moya, S. Farokhipoor, F. Maccherozzi, C. H.W. Barnes, R. P. Cowburn, S. S. Dhesi, N. D. Mathur

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Magnetic vortex cores in polycrystalline Ni discs underwent non-volatile displacements due to voltage-driven ferroelectric domain switching in single-crystal BaTiO3. This behaviour was observed using photoemission electron microscopy to image both the ferromagnetism and ferroelectricity, while varying in-plane sample orientation. The resulting vector maps of disc magnetization match well with micromagnetic simulations, which show that the vortex core is translated by the transit of a ferroelectric domain wall, and thus the inhomogeneous strain with which it is associated. The non-volatility is attributed to pinning inside the discs. Voltage-driven displacement of magnetic vortex cores is novel, and opens the way for studying voltage-driven vortex dynamics.

Original languageEnglish
Article number434003
Number of pages6
JournalJournal of Physics D: Applied Physics
Volume53
Issue number43
DOIs
Publication statusPublished - 21 Oct 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • magnetic imaging
  • magnetoelectrics
  • nanomagnetism

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