Dominant higher-order vortex gyromodes in circular magnetic nanodots

Bondarenko, Artem V; Bunyaev, Sergey A; Shukla, Amit K; Apolinario, Arlete; Singh, Navab; Navas, David; Guslienko, Konstantin Y; Adeyeye, Adekunle O; Kakazei, Gleb N

doi:10.1039/d4nh00145a

Dominant higher-order vortex gyromodes in circular magnetic nanodots

Bondarenko, Artem V; Bunyaev, Sergey A; Shukla, Amit K; Apolinario, Arlete; Singh, Navab; Navas, David; Guslienko, Konstantin Y; Adeyeye, Adekunle O; Kakazei, Gleb N

Authors

Artem V Bondarenko

Sergey A Bunyaev

Amit K Shukla

Arlete Apolinario

Navab Singh

David Navas

Konstantin Y Guslienko

Professor Adekunle Adeyeye adekunle.o.adeyeye@durham.ac.uk
Head of College

Gleb N Kakazei

Abstract

The transition to the third dimension enables the creation of spintronic nanodevices with significantly enhanced functionality compared to traditional 2D magnetic applications. In this study, we extend common two-dimensional magnetic vortex configurations, which are known for their efficient dynamical response to external stimuli without a bias magnetic field, into the third dimension. This extension results in a substantial increase in vortex frequency, reaching up to 5 GHz, compared to the typical sub-GHz range observed in planar vortex oscillators. A systematic study reveals a complex pattern of vortex excitation modes, explaining the decrease in the lowest gyrotropic mode frequency, the inversion of vortex mode intensities, and the nontrivial spatial distribution of vortex dynamical magnetization noted in previous research. These phenomena enable the optimization of both oscillation frequency and frequency reproducibility, minimizing the impact of uncontrolled size variations in those magnetic nanodevices.

Citation

Bondarenko, A. V., Bunyaev, S. A., Shukla, A. K., Apolinario, A., Singh, N., Navas, D., Guslienko, K. Y., Adeyeye, A. O., & Kakazei, G. N. (2024). Dominant higher-order vortex gyromodes in circular magnetic nanodots. Nanoscale Horizons, 9(9), 1381-1590. https://doi.org/10.1039/d4nh00145a

Journal Article Type	Article
Acceptance Date	Jul 12, 2024
Online Publication Date	Jul 19, 2024
Publication Date	Jul 19, 2024
Deposit Date	Aug 6, 2024
Publicly Available Date	Aug 6, 2024
Journal	Nanoscale horizons
Electronic ISSN	2055-6764
Publisher	Royal Society of Chemistry
Peer Reviewed	Peer Reviewed
Volume	9
Issue	9
Pages	1381-1590
DOI	https://doi.org/10.1039/d4nh00145a
Public URL	https://durham-repository.worktribe.com/output/2739744