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Synchronization of the Self-Oscillations of the Magnetic Vortices in Exchange-Coupled Ferromagnetic Disks

  • ORDER, DISORDER, AND PHASE TRANSITION IN CONDENSED SYSTEM
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Abstract

The low-frequency (gyrotropic) self-oscillations of the magnetic vortices in interacting ferromagnetic disks, which are caused by a spin-polarized current, are studied by numerical simulation. Various magnetization oscillation modes depending on the configuration of the magnetic state of the system are considered. The influence of the pumping current nonuniformity on the phase difference of the vortex gyration in neighboring disks is investigated. The overlap of the disks is shown to increase the interaction between the vortices and, hence, to decrease the dephasing of the vortex core oscillations. The prospects of using overlapping disks to ensure phase synchronization of arrays of spin-transfer vortex oscillators are discussed.

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ACKNOWLEDGMENTS

We thank E.A. Karashtin, E.V. Skorokhodov, and R.V. Gorev for useful discussions.

Funding

This work was supported by the Russian Science Foundation, project no. 21-12-00271.

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Authors and Affiliations

  1. Institute for Physics of Microstructures, Russian Academy of Sciences, 607680, Nizhny Novgorod, Russia

    D. A. Tatarskiy, V. L. Mironov & A. A. Fraerman

  2. Lobachevsky State University of Nizhny Novgorod, 603950, Nizhny Novgorod, Russia

    D. A. Tatarskiy

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  1. D. A. Tatarskiy
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  2. V. L. Mironov
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  3. A. A. Fraerman
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Correspondence to D. A. Tatarskiy.

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Translated by K. Shakhlevich

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Tatarskiy, D.A., Mironov, V.L. & Fraerman, A.A. Synchronization of the Self-Oscillations of the Magnetic Vortices in Exchange-Coupled Ferromagnetic Disks. J. Exp. Theor. Phys. 136, 321–329 (2023). https://doi.org/10.1134/S1063776123030172

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  • DOI: https://doi.org/10.1134/S1063776123030172

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