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Voltage-driven displacement of magnetic vortex cores

DOI: 10.1088/1361-6463/aba01d DOI Help

Authors: M. Ghidini (University of Parma; University of Cambridge; Diamond Light Source) , R. Pellicelli (Istituto d'Istruzione Superiore A. Zanelli) , R. Mansell (University of Cambridge; Aalto University) , D. Pesquera (University of Cambridge) , B. Nair (University of Cambridge) , X. Moya (University of Cambridge) , S. Farokhipoor (University of Cambridge) , F. Maccherozzi (Diamond Light Source) , C. H. W. Barnes (University of Cambridge) , R. P. Cowburn (University of Cambridge) , S. S. Dhesi (Diamond Light Source) , N. D. Mathur (University of Cambridge)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Physics D: Applied Physics , VOL 53

State: Published (Approved)
Published: October 2020
Diamond Proposal Number(s): 11843

Open Access Open Access

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.

Diamond Keywords: Data Storage; Ferroelectricity; Ferromagnetism

Subject Areas: Physics, Materials

Instruments: I06-Nanoscience

Added On: 19/08/2020 08:47


Discipline Tags:

Materials Science Quantum Materials Multiferroics Physics Electronics Hard condensed matter - electronic properties Magnetism

Technical Tags:

Microscopy Spectroscopy Electron Microscopy (EM) Circular Dichroism (CD) PhotoEmmission Electron Microscopy (PEEM) X-ray Magnetic Circular Dichroism (XMCD)