Dominant higher-order vortex gyromodes in circular magnetic nanodots

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

doi:10.1039/d4nh00145a

Dominant higher-order vortex gyromodes in circular magnetic nanodots

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

^*Corresponding author for this work

QN/Blanter Group

Research output: Contribution to journal › Article › Scientific › peer-review

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.

Original language	English
Pages (from-to)	1498-1505
Number of pages	8
Journal	Nanoscale Horizons
Issue number	9
DOIs	https://doi.org/10.1039/d4nh00145a
Publication status	Published - 2024

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Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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title = "Dominant higher-order vortex gyromodes in circular magnetic nanodots",

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.",

author = "Bondarenko, {Artem V.} and Bunyaev, {Sergey A.} and Shukla, {Amit K.} and Arlete Apolinario and Navab Singh and David Navas and Guslienko, {Konstantin Y.} and Adeyeye, {Adekunle O.} and Kakazei, {Gleb N.}",

note = "Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.",

year = "2024",

doi = "10.1039/d4nh00145a",

language = "English",

pages = "1498--1505",

journal = "Nanoscale Horizons",

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AU - Bondarenko, Artem V.

AU - Bunyaev, Sergey A.

AU - Shukla, Amit K.

AU - Apolinario, Arlete

AU - Singh, Navab

AU - Navas, David

AU - Guslienko, Konstantin Y.

AU - Adeyeye, Adekunle O.

AU - Kakazei, Gleb N.

N1 - Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2024

Y1 - 2024

N2 - 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.

AB - 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.

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DO - 10.1039/d4nh00145a

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SP - 1498

EP - 1505

JO - Nanoscale Horizons

JF - Nanoscale Horizons

IS - 9

ER -

Dominant higher-order vortex gyromodes in circular magnetic nanodots

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