Dynamics and stability of skyrmions in a bent nano-beam
Magnetic skyrmions are attracting much attention due to their nontrivial topology and high mobility to electric current. Nevertheless, suppression of the skyrmion Hall effect and maintaining high velocity of skyrmions with low energy cost are two major challenges concerning skyrmion-based spintronic...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac3a82 |
| _version_ | 1797749998466629632 |
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| author | Anruo Zhong Xiaoming Lan Yangfan Hu Biao Wang |
| author_facet | Anruo Zhong Xiaoming Lan Yangfan Hu Biao Wang |
| author_sort | Anruo Zhong |
| collection | DOAJ |
| description | Magnetic skyrmions are attracting much attention due to their nontrivial topology and high mobility to electric current. Nevertheless, suppression of the skyrmion Hall effect and maintaining high velocity of skyrmions with low energy cost are two major challenges concerning skyrmion-based spintronic devices. Here we show theoretically that in a nano-beam suffering appropriate bending moment, both Bloch-type and Néel-type skyrmions move with a vanishing Hall angle under a current density smaller than that required when the bending is absent. Moreover, bending alone can be used to move skyrmions, whose velocity is solved analytically from the Thiele equation. Generally speaking, inhomogeneous elastic fields affect the stability and dynamics of skyrmions, where the local stability is dominantly determined by the local bulk stress. These findings throw new light on how to drive skyrmions in a straight line with lower energy cost, which is vital for utilizing skyrmions as information carriers. |
| first_indexed | 2024-03-12T16:27:36Z |
| format | Article |
| id | doaj.art-892a960a63674ce3ae03d6b6e93f71c3 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:27:36Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-892a960a63674ce3ae03d6b6e93f71c32023-08-08T15:40:24ZengIOP PublishingNew Journal of Physics1367-26302022-01-0124303301910.1088/1367-2630/ac3a82Dynamics and stability of skyrmions in a bent nano-beamAnruo Zhong0Xiaoming Lan1Yangfan Hu2https://orcid.org/0000-0001-8954-4028Biao Wang3School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, People’s Republic of China; Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, People’s Republic of ChinaSchool of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, People’s Republic of China; Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, People’s Republic of ChinaSchool of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, People’s Republic of China; Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, People’s Republic of ChinaSchool of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, People’s Republic of China; Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, People’s Republic of ChinaMagnetic skyrmions are attracting much attention due to their nontrivial topology and high mobility to electric current. Nevertheless, suppression of the skyrmion Hall effect and maintaining high velocity of skyrmions with low energy cost are two major challenges concerning skyrmion-based spintronic devices. Here we show theoretically that in a nano-beam suffering appropriate bending moment, both Bloch-type and Néel-type skyrmions move with a vanishing Hall angle under a current density smaller than that required when the bending is absent. Moreover, bending alone can be used to move skyrmions, whose velocity is solved analytically from the Thiele equation. Generally speaking, inhomogeneous elastic fields affect the stability and dynamics of skyrmions, where the local stability is dominantly determined by the local bulk stress. These findings throw new light on how to drive skyrmions in a straight line with lower energy cost, which is vital for utilizing skyrmions as information carriers.https://doi.org/10.1088/1367-2630/ac3a82skyrmionsmagnetoelastic couplingskyrmion Hall effectbending |
| spellingShingle | Anruo Zhong Xiaoming Lan Yangfan Hu Biao Wang Dynamics and stability of skyrmions in a bent nano-beam New Journal of Physics skyrmions magnetoelastic coupling skyrmion Hall effect bending |
| title | Dynamics and stability of skyrmions in a bent nano-beam |
| title_full | Dynamics and stability of skyrmions in a bent nano-beam |
| title_fullStr | Dynamics and stability of skyrmions in a bent nano-beam |
| title_full_unstemmed | Dynamics and stability of skyrmions in a bent nano-beam |
| title_short | Dynamics and stability of skyrmions in a bent nano-beam |
| title_sort | dynamics and stability of skyrmions in a bent nano beam |
| topic | skyrmions magnetoelastic coupling skyrmion Hall effect bending |
| url | https://doi.org/10.1088/1367-2630/ac3a82 |
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