High-frequency spin transfer nano-oscillator based on the motion of skyrmions in an annular groove
Magnetic skyrmion-based spin transfer nano-oscillators (STNOs) have been proposed as microwave signal generators and attracted enormous interest recently. However, the oscillation frequency of skyrmion-based STNOs is about 2 GHz, which is not so high for practical applications. In this paper, we cre...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/ab7258 |
| _version_ | 1797750385931190272 |
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| author | Chendong Jin Yunxu Ma Chengkun Song Haiyan Xia Jianing Wang Chunlei Zhang Zhaozhuo Zeng Jianbo Wang Qingfang Liu |
| author_facet | Chendong Jin Yunxu Ma Chengkun Song Haiyan Xia Jianing Wang Chunlei Zhang Zhaozhuo Zeng Jianbo Wang Qingfang Liu |
| author_sort | Chendong Jin |
| collection | DOAJ |
| description | Magnetic skyrmion-based spin transfer nano-oscillators (STNOs) have been proposed as microwave signal generators and attracted enormous interest recently. However, the oscillation frequency of skyrmion-based STNOs is about 2 GHz, which is not so high for practical applications. In this paper, we create an annular groove in the surface of the free layer and put skyrmions in the annular groove. Due to the potential of the groove, skyrmions are confined to moving in the groove when driven by the spin-polarized currents. Through micromagnetic simulations, it is found that the frequency tunability of the STNO with the presence of the annular groove reaches to 15.63 GHz, which is more than 6 times higher than the case without the presence of the annular groove because of three reasons: the oscillation radius of skyrmions can be adjusted by the groove, the potential of the groove is larger than that of the edge and the groove can limit the diameter of skyrmions so that a larger number of skyrmions can be placed in the groove. Our results present the understanding of dynamic of skyrmions in an annular groove, which provides alternative possibilities for the design of skyrmion-based STNOs. |
| first_indexed | 2024-03-12T16:32:00Z |
| format | Article |
| id | doaj.art-ef120b71f39c40db87c97c281cc73571 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:32:00Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-ef120b71f39c40db87c97c281cc735712023-08-08T15:28:26ZengIOP PublishingNew Journal of Physics1367-26302020-01-0122303300110.1088/1367-2630/ab7258High-frequency spin transfer nano-oscillator based on the motion of skyrmions in an annular grooveChendong Jin0Yunxu Ma1Chengkun Song2Haiyan Xia3Jianing Wang4Chunlei Zhang5Zhaozhuo Zeng6Jianbo Wang7https://orcid.org/0000-0002-4203-8336Qingfang Liu8https://orcid.org/0000-0001-6533-2880Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University , Lanzhou 730000, People’s Republic of ChinaKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University , Lanzhou 730000, People’s Republic of ChinaKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University , Lanzhou 730000, People’s Republic of ChinaKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University , Lanzhou 730000, People’s Republic of ChinaKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University , Lanzhou 730000, People’s Republic of ChinaKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University , Lanzhou 730000, People’s Republic of ChinaKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University , Lanzhou 730000, People’s Republic of ChinaKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University , Lanzhou 730000, People’s Republic of China; Key Laboratory for Special Function Materials and Structural Design of the Ministry of the Education, Lanzhou University , Lanzhou 730000, People’s Republic of ChinaKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University , Lanzhou 730000, People’s Republic of ChinaMagnetic skyrmion-based spin transfer nano-oscillators (STNOs) have been proposed as microwave signal generators and attracted enormous interest recently. However, the oscillation frequency of skyrmion-based STNOs is about 2 GHz, which is not so high for practical applications. In this paper, we create an annular groove in the surface of the free layer and put skyrmions in the annular groove. Due to the potential of the groove, skyrmions are confined to moving in the groove when driven by the spin-polarized currents. Through micromagnetic simulations, it is found that the frequency tunability of the STNO with the presence of the annular groove reaches to 15.63 GHz, which is more than 6 times higher than the case without the presence of the annular groove because of three reasons: the oscillation radius of skyrmions can be adjusted by the groove, the potential of the groove is larger than that of the edge and the groove can limit the diameter of skyrmions so that a larger number of skyrmions can be placed in the groove. Our results present the understanding of dynamic of skyrmions in an annular groove, which provides alternative possibilities for the design of skyrmion-based STNOs.https://doi.org/10.1088/1367-2630/ab7258spin transfer nano-oscillatorskyrmionannular groove |
| spellingShingle | Chendong Jin Yunxu Ma Chengkun Song Haiyan Xia Jianing Wang Chunlei Zhang Zhaozhuo Zeng Jianbo Wang Qingfang Liu High-frequency spin transfer nano-oscillator based on the motion of skyrmions in an annular groove New Journal of Physics spin transfer nano-oscillator skyrmion annular groove |
| title | High-frequency spin transfer nano-oscillator based on the motion of skyrmions in an annular groove |
| title_full | High-frequency spin transfer nano-oscillator based on the motion of skyrmions in an annular groove |
| title_fullStr | High-frequency spin transfer nano-oscillator based on the motion of skyrmions in an annular groove |
| title_full_unstemmed | High-frequency spin transfer nano-oscillator based on the motion of skyrmions in an annular groove |
| title_short | High-frequency spin transfer nano-oscillator based on the motion of skyrmions in an annular groove |
| title_sort | high frequency spin transfer nano oscillator based on the motion of skyrmions in an annular groove |
| topic | spin transfer nano-oscillator skyrmion annular groove |
| url | https://doi.org/10.1088/1367-2630/ab7258 |
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