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Microwave-induced dynamic switching of magnetic skyrmion cores in nanodots

Microwave-induced dynamic switching of magnetic skyrmion cores in nanodots
Microwave-induced dynamic switching of magnetic skyrmion cores in nanodots
The nonlinear dynamic behavior of a magnetic skyrmion in circular nanodots was studied numerically by solving the Landau-Lifshitz-Gilbert equation with a classical spin model. We show that a skyrmion core reversal can be achieved within nanoseconds using a perpendicular oscillating magnetic field. Two symmetric switching processes that correspond to excitations of the breathing mode and the mixed mode (combination of the breathing mode and a radial spin-wave mode) are identified. For excitation of the breathing mode, the skyrmion core switches through nucleation of a new core from a transient uniform state. In the mixed mode, the skyrmion core reverses with the help of spins excited both at the edge and core regions. Unlike the magnetic vortex core reversal, the excitation of radial spin waves does not dominate the skyrmion core reversal process
0003-6951
Zhang, Bin
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Wang, Weiwei
42981e5f-b7ee-44f7-a64d-d47ab0cacbce
Beg, Marijan
499a2633-2ab7-4ec3-ab2a-c6eae1874f83
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Kuch, Wolfgang
4f4d472c-69d1-4c65-b650-53944801ec85
Zhang, Bin
845a7672-e33d-4a3a-a177-b8a15190aa63
Wang, Weiwei
42981e5f-b7ee-44f7-a64d-d47ab0cacbce
Beg, Marijan
499a2633-2ab7-4ec3-ab2a-c6eae1874f83
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Kuch, Wolfgang
4f4d472c-69d1-4c65-b650-53944801ec85

Zhang, Bin, Wang, Weiwei, Beg, Marijan, Fangohr, Hans and Kuch, Wolfgang (2015) Microwave-induced dynamic switching of magnetic skyrmion cores in nanodots. Applied Physics Letters, 106 (10). (doi:10.1063/1.4914496).

Record type: Article

Abstract

The nonlinear dynamic behavior of a magnetic skyrmion in circular nanodots was studied numerically by solving the Landau-Lifshitz-Gilbert equation with a classical spin model. We show that a skyrmion core reversal can be achieved within nanoseconds using a perpendicular oscillating magnetic field. Two symmetric switching processes that correspond to excitations of the breathing mode and the mixed mode (combination of the breathing mode and a radial spin-wave mode) are identified. For excitation of the breathing mode, the skyrmion core switches through nucleation of a new core from a transient uniform state. In the mixed mode, the skyrmion core reverses with the help of spins excited both at the edge and core regions. Unlike the magnetic vortex core reversal, the excitation of radial spin waves does not dominate the skyrmion core reversal process

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Hans Fangor sept 2015 1503.02869 v1.pdf - Accepted Manuscript
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Accepted/In Press date: 27 February 2015
Published date: 9 March 2015
Organisations: Computational Engineering & Design Group

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Local EPrints ID: 381813
URI: https://eprints.soton.ac.uk/id/eprint/381813
ISSN: 0003-6951
PURE UUID: 72aa6eb7-1ccd-4302-b2ab-35e1a23a1e59

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Date deposited: 16 Oct 2015 08:30
Last modified: 29 Nov 2018 17:31

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Contributors

Author: Bin Zhang
Author: Weiwei Wang
Author: Marijan Beg
Author: Hans Fangohr
Author: Wolfgang Kuch

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