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Voltage-controlled magnetic solitons motion in an anisotropic ferromagnetic nanowire
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Voltage-controlled magnetic solitons motion in an anisotropic ferromagnetic nanowire
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Voltage-controlled magnetic solitons motion in an anisotropic ferromagnetic nanowire
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Journal Article
Voltage-controlled magnetic solitons motion in an anisotropic ferromagnetic nanowire
2023
Overview
The precise manipulation of magnetic solitons remains a challenge and is considered a crucial process in magnetic storage. In this paper, we investigate the control of velocity and spatial manipulation of magnetic solitons using the voltage-controlled magnetic anisotropy effect. A long-wave model, known as the generalized derivative nonlinear Schrödinger (GDNLS) equation, is developed to describe the dynamics of magnetic solitons in an anisotropic ferromagnetic nanowire. By constructing the Lax pair for the GDNLS equation, we obtain the exact solutions including magnetic dark solitons, anti-dark solitons, and periodic solutions. Moreover, we propose two approaches to manipulate magnetic solitons: direct voltage application and inhomogeneous insulation layer design. Numerically results show the direct modulation of soliton velocity by a constant voltage, while time-varying voltage induces periodic oscillations. Investigation of Gaussian-type defects reveals soliton being trapped beyond a critical defect depth. These results provide a theoretical basis for future applications in magnetic soliton-based memory devices.
