Current-driven magnetization reversal dynamics and breather-like EM soliton propagation in biaxial anisotropic weak ferromagnetic nanowire

We investigate the effect of spin torque on the switching dynamics of magnetic solitons in a weak ferromagnetic nanowire under the influence of an electromagnetic wave (EMW). The magnetization dynamics of the current-driven ferromagnetic nanowire and the EMW propagation is governed by the celebrated...

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Bibliographic Details
Published in:Nonlinear dynamics 2022-02, Vol.107 (3), p.2667-2687
Main Authors: Kavitha, L., Pavithra, T., Boopathy, C., Kumar, V. Senthil, Mani, Awadhesh, Gopi, D.
Format: Article
Language:English
Subjects:
Automotive Engineering
Axial stress
Classical Mechanics
Control
Damping
Dynamical Systems
Electromagnetic radiation
Elliptic functions
Engineering
Ferromagnetism
Magnetization reversal
Mathematical analysis
Maxwell's equations
Mechanical Engineering
Nanowires
Original Paper
Perturbation methods
Propagation
Solitary waves
Spin dynamics
Switching
Torque
Vibration
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Summary:We investigate the effect of spin torque on the switching dynamics of magnetic solitons in a weak ferromagnetic nanowire under the influence of an electromagnetic wave (EMW). The magnetization dynamics of the current-driven ferromagnetic nanowire and the EMW propagation is governed by the celebrated Landau-Lifshitz-Gilbert (LLG) vector equation and the Maxwell’s equations, respectively. We recast the set of LLG and Maxwell equations onto the extended derivative nonlinear Schr o ¨ dinger (EDNLS) equation. We employ the nonlinear perturbation analysis along the lines of Kodama and Ablowitz and analyze the interplay of the Dzyaloshinskii-Moriya interaction (DMI) along with the spin transfer torque on the magnetization reversal dynamics by solving the associated evolution equations for the soliton parameters. We also demonstrate the spin-polarized current triggers an ultrafast switching of EM solitons in the ferromagnetic nanowire in the range of 0.58 - 0.12 n s , and the Gilbert damping supports the EM soliton switching to sustain indefinitely. We invoke the Jacobi elliptic function method to explore the propagation of breather-like solitonic localized modes along the ferromagnetic nanowire.
ISSN:0924-090X
1573-269X
DOI:10.1007/s11071-021-06997-w