Magnetic lump motion in saturated ferromagnetic films
arXiv:2307.00903 · doi:10.1103/PhysRevE.105.014205
Abstract
In this paper, we study in detail the nonlinear propagation of magnetic soliton in a ferromagnetic film. The sample is magnetized to saturation by an external field perpendicular to film plane. A new generalized (2+1)-dimensional short-wave asymptotic model is derived. The bilinear-like forms of this equation are constructed, and exact magnetic line soliton solutions are exhibited. It is observed that a series of stable lumps can be generated by an unstable magnetic soliton under Gaussian disturbance. Such magnetic lumps are highly stable and can maintain their shapes and velocities during evolution or collision. The interaction between lump and magnetic soliton, as well as interaction between two lumps, are numerically investigated. We further discuss the nonlinear motion of lumps in ferrites with Gilbert-damping and inhomogeneous exchange effects. The results show that the Gilbert-damping effects make the amplitude and velocity of the magnetic lump decay exponentially during propagation. And the shock waves are generated from a lump when quenching the strength of inhomogeneous exchange.
arXiv comment7 pages, 7figures
References in corpus (9)
- Soliton Solution for the Spin Current in Ferromagnetic Nanowire
- Magnetic solitons in a spin-1 Bose-Einstein condensate
- Rogue wave, interaction solutions to the KMM system
- Confined dissipative droplet solitons in spin-valve nanowires with perpendicular magnetic anisotropy
- Propagation and control of nano-scale, magnetic droplet solitons
- Flemish Strings of Magnetic Solitons and a Non-Thermal Fixed Point in a One-Dimensional Antiferromagnetic Spin-1 Bose Gas
- Magnetic soliton: from two to three components with SO(3) symmetry
- Dark soliton-like magnetic domain walls in a two-dimensional ferromagnetic superfluid
- Engineering solitons and breathers in a deformed ferromagnet: Effect of localised inhomogeneities