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Voltage-driven displacement of magnetic vortex cores
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
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