Voltage-driven displacement of magnetic vortex cores

DOI: 10.1088/1361-6463/aba01d

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

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.

Subject Areas: Physics


Instruments: I06-Nanoscience

Documents:
Ghidini_2020_J._Phys._D%3A_Appl._Phys._53_434003.pdf