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Spin transfer nano-oscillator based on synthetic antiferromagnetic skyrmion pair assisted by perpendicular fixed magnetic field |
| Yun-Xu Ma(马云旭)1, Jia-Ning Wang(王佳宁)1, Zhao-Zhuo Zeng(曾钊卓)1, Ying-Yue Yuan(袁映月)1, Jin-Xia Yang(杨金霞)1, Hui-Bo Liu(刘慧博)1, Sen-Fu Zhang(张森富)1, Jian-Bo Wang(王建波)1,2, Chen-Dong Jin(金晨东)3, and Qing-Fang Liu(刘青芳)1,† |
1. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;
2. Key Laboratory for Special Function Materials and Structural Design of the Ministry of Education, Lanzhou University, Lanzhou 730000, China;
3. College of Physics Science and Technology, Hebei University, Baoding 071002, China |
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Abstract As a microwave generator, spin transfer nano-oscillator (STNO) based on skyrmion promises to become one of the next-generation spintronic devices. However, there still exist a few limitations to the practical applications. In this paper, we propose a new STNO based on synthetic antiferromagnetic (SAF) skyrmion pair assisted by a perpendicular fixed magnetic field. It is found that the oscillation frequency of this kind of STNO can reach up to 5.0 GHz, and the multiple oscillation peak with higher frequency can be realized under a fixed out-of-plane magnetic field. Further investigation shows that the skyrmion stability is improved by bilayer antiferromagnetic coupling, which guarantees the stability process of skyrmion under higher spin-polarized current density. Our results provide the alternative possibilities for designing new skyrmion-based STNO to further improve the oscillation frequency, and realize the output of multiple frequency microwave signal.
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Received: 10 March 2022
Revised: 27 April 2022
Accepted manuscript online:
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PACS:
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05.45.Xt
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(Synchronization; coupled oscillators)
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12.39.Dc
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(Skyrmions)
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72.25.Hg
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(Electrical injection of spin polarized carriers)
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85.75.-d
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(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12074158, 12174166, 12104197, and 12104124) and the Natural Science Foundation of Hebei Province, China (Grant No. A2021201008). |
Corresponding Authors:
Qing-Fang Liu
E-mail: liuqf@lzu.edu.cn
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Cite this article:
Yun-Xu Ma(马云旭), Jia-Ning Wang(王佳宁), Zhao-Zhuo Zeng(曾钊卓), Ying-Yue Yuan(袁映月), Jin-Xia Yang(杨金霞), Hui-Bo Liu(刘慧博), Sen-Fu Zhang(张森富), Jian-Bo Wang(王建波), Chen-Dong Jin(金晨东), and Qing-Fang Liu(刘青芳) Spin transfer nano-oscillator based on synthetic antiferromagnetic skyrmion pair assisted by perpendicular fixed magnetic field 2022 Chin. Phys. B 31 100501
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