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<p>This study investigates solitons as a fundamental mechanism for ultrashort pulse transmission in ferromagnetic nanowires, influenced by Dzyaloshinskii-Moriya interaction (DMI) strength, exchange coupling and anisotropy constant. In the continuum limit, it is described using a dimensionless Hamiltonian framework developed for anisotropic ferromagnetic nanowires, incorporating the effects of adiabatic spin-transfer torque. The evolution of electromagnetic (EM) solitary waves is modeled by a generalized extended derivative nonlinear Schrödinger (GEDNLS) equation, derived from the stereographic projection technique. This formulation allows for the analytical investigation of soliton interactions using the Hirota bilinear method, enabling efficient classification of complex solitonic structures in nanowire materials. Furthermore, the resulting analytical solutions reveal a rich spectrum of solitonic excitations, including X-type, Y-type, and fusion-fission-type collision patterns. The study also explores how nonlinear parameters modulate soliton transmission and collision dynamics. The robustness of the results is validated through the Fourier collocation method across nonlinear regimes, with eigenvalue spectra exhibiting notable shifts under increasing nonlinearity. These findings underscore the potential of solitons for efficient, low-loss, and low-power spintronic applications.</p>

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Controlled Soliton Interactions and Stability in Parametrically Driven Nanowires for Spintronic Systems

  • 期刊论文

  • 发表日期：

    2025年9月12日

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  • R. Ravichandran

摘要

This study investigates solitons as a fundamental mechanism for ultrashort pulse transmission in ferromagnetic nanowires, influenced by Dzyaloshinskii-Moriya interaction (DMI) strength, exchange coupling and anisotropy constant. In the continuum limit, it is described using a dimensionless Hamiltonian framework developed for anisotropic ferromagnetic nanowires, incorporating the effects of adiabatic spin-transfer torque. The evolution of electromagnetic (EM) solitary waves is modeled by a generalized extended derivative nonlinear Schrödinger (GEDNLS) equation, derived from the stereographic projection technique. This formulation allows for the analytical investigation of soliton interactions using the Hirota bilinear method, enabling efficient classification of complex solitonic structures in nanowire materials. Furthermore, the resulting analytical solutions reveal a rich spectrum of solitonic excitations, including X-type, Y-type, and fusion-fission-type collision patterns. The study also explores how nonlinear parameters modulate soliton transmission and collision dynamics. The robustness of the results is validated through the Fourier collocation method across nonlinear regimes, with eigenvalue spectra exhibiting notable shifts under increasing nonlinearity. These findings underscore the potential of solitons for efficient, low-loss, and low-power spintronic applications.