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Dynamics of magnetic skyrmion clusters driven by spin-polarized current with a spatially varied polarization

Dynamics of magnetic skyrmion clusters driven by spin-polarized current with a spatially varied polarization
Dynamics of magnetic skyrmion clusters driven by spin-polarized current with a spatially varied polarization

Magnetic skyrmions are promising candidates for future information technology. Here, we present a micromagnetic study of isolated skyrmions and skyrmion clusters in ferromagnetic nanodisks driven by the spin-polarized current with spatially varied polarization. The current-driven skyrmion clusters can be either dynamic steady or static, depending on the spatially varied polarization profile. For the dynamic steady state, the skyrmion cluster moves in a circle in the nanodisk, while for the static state, the skyrmion cluster is static. The frequency of the circular motion of skyrmion is also studied. Furthermore, the dependence of the skyrmion cluster dynamics on the magnetic anisotropy and Dzyaloshinskii-Moriya interaction is investigated. Our results may provide a pathway to realize magnetic skyrmion cluster based devices.

Current density, Damping, Dynamics, magnetic skyrmion, Magnetism in solids, Micromagnetics, micromagnetics, Oscillators, Perpendicular magnetic anisotropy, spin current, spintronics
1949-307X
1-5
Jiang, Wenjing
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Xia, Jing
afd3810b-b7ca-4d54-8ff0-b385617d0ad3
Zhang, Xichao
d1c62ad8-1482-42f6-829f-38538cca4a2b
Song, Yifan
c8568e4a-5dce-4255-8084-47ea2718fe06
Ma, Chuang
30e4a4c5-bccc-4a00-a44e-9aafe0b6b178
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Zhao, Guoping
2570ed02-b6f7-48df-921f-a76737e51c79
Liu, Xiaoxi
a72b2b46-0167-4db5-adee-d8eb01bd9f15
Zhao, Weisheng
e7f5276e-5257-4c1f-bece-6119ea4bdfd6
Zhou, Yan
7ffa57ee-d3eb-420c-a5a2-67b2330a0757
Jiang, Wenjing
b4ea1be1-1caf-4a04-ae8f-62ed9e5a181c
Xia, Jing
afd3810b-b7ca-4d54-8ff0-b385617d0ad3
Zhang, Xichao
d1c62ad8-1482-42f6-829f-38538cca4a2b
Song, Yifan
c8568e4a-5dce-4255-8084-47ea2718fe06
Ma, Chuang
30e4a4c5-bccc-4a00-a44e-9aafe0b6b178
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Zhao, Guoping
2570ed02-b6f7-48df-921f-a76737e51c79
Liu, Xiaoxi
a72b2b46-0167-4db5-adee-d8eb01bd9f15
Zhao, Weisheng
e7f5276e-5257-4c1f-bece-6119ea4bdfd6
Zhou, Yan
7ffa57ee-d3eb-420c-a5a2-67b2330a0757

Jiang, Wenjing, Xia, Jing, Zhang, Xichao, Song, Yifan, Ma, Chuang, Fangohr, Hans, Zhao, Guoping, Liu, Xiaoxi, Zhao, Weisheng and Zhou, Yan (2018) Dynamics of magnetic skyrmion clusters driven by spin-polarized current with a spatially varied polarization. IEEE Magnetics Letters, 9, 1-5. (doi:10.1109/LMAG.2018.2825280).

Record type: Article

Abstract

Magnetic skyrmions are promising candidates for future information technology. Here, we present a micromagnetic study of isolated skyrmions and skyrmion clusters in ferromagnetic nanodisks driven by the spin-polarized current with spatially varied polarization. The current-driven skyrmion clusters can be either dynamic steady or static, depending on the spatially varied polarization profile. For the dynamic steady state, the skyrmion cluster moves in a circle in the nanodisk, while for the static state, the skyrmion cluster is static. The frequency of the circular motion of skyrmion is also studied. Furthermore, the dependence of the skyrmion cluster dynamics on the magnetic anisotropy and Dzyaloshinskii-Moriya interaction is investigated. Our results may provide a pathway to realize magnetic skyrmion cluster based devices.

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1801.08699 - Accepted Manuscript
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Accepted/In Press date: 9 April 2018
e-pub ahead of print date: 10 April 2018
Keywords: Current density, Damping, Dynamics, magnetic skyrmion, Magnetism in solids, Micromagnetics, micromagnetics, Oscillators, Perpendicular magnetic anisotropy, spin current, spintronics

Identifiers

Local EPrints ID: 420502
URI: https://eprints.soton.ac.uk/id/eprint/420502
ISSN: 1949-307X
PURE UUID: 2f6dc203-b9db-4421-b5f6-4d998f3de4b7

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Date deposited: 09 May 2018 16:30
Last modified: 11 Apr 2019 04:02

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