Propagation, generation, and utilization of topologically trivial magnetic solitons in magnetic nanowires

doi:10.1088/1674-1056/adf4ab

中国物理B ›› 2025, Vol. 34 ›› Issue (10): 107502-107502.doi: 10.1088/1674-1056/adf4ab

所属专题： SPECIAL TOPIC — Advanced magnonics

Propagation, generation, and utilization of topologically trivial magnetic solitons in magnetic nanowires

Kai-Tao Huang(黄铠涛) and X. S. Wang(王宪思)†

School of Physics and Electronics, Hunan University, Changsha 410082, China

收稿日期:2025-04-01 修回日期:2025-07-24 接受日期:2025-07-28 发布日期:2025-10-22
通讯作者: X. S. Wang E-mail:justicewxs@hnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grants Nos. 11804045 and 12174093), the Natural Science Foundation of Hunan Province of China (Grant No. 2025JJ60001), and the Fundamental Research Funds for the Central Universities.

Propagation, generation, and utilization of topologically trivial magnetic solitons in magnetic nanowires

Kai-Tao Huang(黄铠涛) and X. S. Wang(王宪思)†

School of Physics and Electronics, Hunan University, Changsha 410082, China

Received:2025-04-01 Revised:2025-07-24 Accepted:2025-07-28 Published:2025-10-22
Contact: X. S. Wang E-mail:justicewxs@hnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grants Nos. 11804045 and 12174093), the Natural Science Foundation of Hunan Province of China (Grant No. 2025JJ60001), and the Fundamental Research Funds for the Central Universities.

1. 2025-107502-SI.mp4(89KB)

摘要/Abstract

摘要： Magnetic solitons are nonlinear, local excitations in magnetic systems. In this study, we theoretically and numerically investigate the properties and generation of one-dimensional (1D) topologically trivial magnetic solitons in ferromagnetic nanowires. An approximate analytical soliton solution described by two free parameters is validated by comparison with the micromagnetic simulation. Across an interface between two media of different anisotropy, the reflection and refraction of a soliton are highly nonlinear, which differ from linear spin waves. A pair of magnetic solitons that propagate in opposite directions can be generated by alternately applying magnetic-field or spin-polarized-current pulses of opposite directions to at least two successive regions. Each soliton corresponds to a soliton solution that can be controlled by the generation process. These magnetic solitons can be used to drive domain wall motion over a distance determined by the soliton magnitude, allowing for discrete manipulation of domain walls compatible with the digital nature of information technology. Our findings pave the way for the application of topologically trivial solitons in spintronics.

关键词: magnetization dynamics, soliton, nonlinear dynamics

Abstract: Magnetic solitons are nonlinear, local excitations in magnetic systems. In this study, we theoretically and numerically investigate the properties and generation of one-dimensional (1D) topologically trivial magnetic solitons in ferromagnetic nanowires. An approximate analytical soliton solution described by two free parameters is validated by comparison with the micromagnetic simulation. Across an interface between two media of different anisotropy, the reflection and refraction of a soliton are highly nonlinear, which differ from linear spin waves. A pair of magnetic solitons that propagate in opposite directions can be generated by alternately applying magnetic-field or spin-polarized-current pulses of opposite directions to at least two successive regions. Each soliton corresponds to a soliton solution that can be controlled by the generation process. These magnetic solitons can be used to drive domain wall motion over a distance determined by the soliton magnitude, allowing for discrete manipulation of domain walls compatible with the digital nature of information technology. Our findings pave the way for the application of topologically trivial solitons in spintronics.

Key words: magnetization dynamics, soliton, nonlinear dynamics

中图分类号: (Magnetization dynamics)

75.78.-n

05.45.Yv (Solitons)

Kai-Tao Huang(黄铠涛) and X. S. Wang(王宪思). Propagation, generation, and utilization of topologically trivial magnetic solitons in magnetic nanowires[J]. 中国物理B, 2025, 34(10): 107502-107502.

Kai-Tao Huang(黄铠涛) and X. S. Wang(王宪思). Propagation, generation, and utilization of topologically trivial magnetic solitons in magnetic nanowires[J]. Chin. Phys. B, 2025, 34(10): 107502-107502.

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Propagation, generation, and utilization of topologically trivial magnetic solitons in magnetic nanowires

Propagation, generation, and utilization of topologically trivial magnetic solitons in magnetic nanowires

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