中国物理B ›› 2024, Vol. 33 ›› Issue (11): 117501-117501.doi: 10.1088/1674-1056/ad7577

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Dynamic properties of the magnetic skyrmion driven by electromagnetic waves with spin angular momentum and orbital angular momentum

Longfei Guo(郭龙飞), Bing Zha(查兵), Xiaoqiao Sun(孙晓乔), Songmei Ni(倪松梅), Ruiyu Huang(黄瑞玉), Lin Chen(陈琳), and Zhikuo Tao(陶志阔)†   

  1. College of Electronic and Optical Engineering & College of Flexible Electronics, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • 收稿日期:2024-06-04 修回日期:2024-08-05 接受日期:2024-08-30 出版日期:2024-11-15 发布日期:2024-11-15

Dynamic properties of the magnetic skyrmion driven by electromagnetic waves with spin angular momentum and orbital angular momentum

Longfei Guo(郭龙飞), Bing Zha(查兵), Xiaoqiao Sun(孙晓乔), Songmei Ni(倪松梅), Ruiyu Huang(黄瑞玉), Lin Chen(陈琳), and Zhikuo Tao(陶志阔)†   

  1. College of Electronic and Optical Engineering & College of Flexible Electronics, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • Received:2024-06-04 Revised:2024-08-05 Accepted:2024-08-30 Online:2024-11-15 Published:2024-11-15
  • Contact: Zhikuo Tao E-mail:zktao@njupt.edu.cn

摘要: We theoretically studied the dynamic properties of the skyrmion driven by electromagnetic (EM) waves with spin angular momentum (SAM) and orbital angular momentum (OAM) using micromagnetic simulations. First, the guiding centers of the skyrmion driven by EM waves with SAM, i.e., left-handed and right-handed circularly polarized EM waves, present circular trajectories, while present elliptical trajectories under linear EM waves driving due to the superposition of oppositely polarized wave components. Second, the trajectories of the skyrmion driven by EM waves with OAM demonstrate similar behavior to that driven by linearly polarized EM waves. Because the wave vector intensity varies with the phase for both linearly polarized EM waves and EM waves with OAM, the angular momentum is transferred to the skyrmion non-uniformly, while the angular momentum is transferred to the skyrmion uniformly for left-handed and right-handed circularly polarized EM driving. Third, the dynamic properties of the skyrmion driven by EM waves with both SAM and OAM are investigated. It is found that the dynamic trajectories exhibit more complex behavior due to the contributions or competition of SAM and OAM. We investigate the characteristics of intrinsic gyration modes and frequency-dependent trajectories. Our research may provide insight into the dynamic properties of skyrmion manipulated by EM waves with SAM or OAM and provide a method for controlling skyrmion in spintronic devices.

关键词: skyrmion, spin angular momentum, orbital angular momentum, dynamic properties

Abstract: We theoretically studied the dynamic properties of the skyrmion driven by electromagnetic (EM) waves with spin angular momentum (SAM) and orbital angular momentum (OAM) using micromagnetic simulations. First, the guiding centers of the skyrmion driven by EM waves with SAM, i.e., left-handed and right-handed circularly polarized EM waves, present circular trajectories, while present elliptical trajectories under linear EM waves driving due to the superposition of oppositely polarized wave components. Second, the trajectories of the skyrmion driven by EM waves with OAM demonstrate similar behavior to that driven by linearly polarized EM waves. Because the wave vector intensity varies with the phase for both linearly polarized EM waves and EM waves with OAM, the angular momentum is transferred to the skyrmion non-uniformly, while the angular momentum is transferred to the skyrmion uniformly for left-handed and right-handed circularly polarized EM driving. Third, the dynamic properties of the skyrmion driven by EM waves with both SAM and OAM are investigated. It is found that the dynamic trajectories exhibit more complex behavior due to the contributions or competition of SAM and OAM. We investigate the characteristics of intrinsic gyration modes and frequency-dependent trajectories. Our research may provide insight into the dynamic properties of skyrmion manipulated by EM waves with SAM or OAM and provide a method for controlling skyrmion in spintronic devices.

Key words: skyrmion, spin angular momentum, orbital angular momentum, dynamic properties

中图分类号:  (Spin waves)

  • 75.30.Ds
75.80.+q (Magnetomechanical effects, magnetostriction) 85.70.Ay (Magnetic device characterization, design, and modeling) 12.39.Dc (Skyrmions)