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.
Voltage-driven displacement of magnetic vortex cores / Ghidini, M.; Pellicelli, R.; Mansell, R.; Pesquera, D.; Nair, B.; Moya, X.; Farokhipoor, S.; Maccherozzi, F.; Barnes, C. H. W.; Cowburn, R. P.; Dhesi, S. S.; Mathur, N. D.. - In: JOURNAL OF PHYSICS D. APPLIED PHYSICS. - ISSN 0022-3727. - 53:43(2020), p. 434003. [10.1088/1361-6463/aba01d]
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