Soliton dynamics in two coupled ferromagnetic chains

19th International School on Condensed Matter Physics: Advances in Nanostructured Condensed Matter: Research and Innovations

Varbev, S.K.^1 ; Primatarowa, M.T.^1 ; Kamburova, R.S.^1

Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, Sofia

1784, Bulgaria^1

关键词: Coupled set;    Coupling interaction;    Discrete equations;    Ferromagnetic chains;    Magnetic parameters;    Soliton dynamics;    Soliton excitations;    Soliton solutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/794/1/012027/pdf
DOI  :  10.1088/1742-6596/794/1/012027

来源: IOP

【 摘 要 】

The soliton dynamics in a system of two ferromagnetic chains coupled through the interaction between opposite spins is studied. The on-site anisotropy in the chains is also taken into account. The conditions for the existence of different soliton solutions (bright or dark) in the chains are obtained. The system is reduced to a coupled set of discrete equations with complicated coupling interactions which are linear and nonlinear. We investigate the propagation of a soliton excitation launched in one of the chains with a given velocity. The condition for a perfect switch of the soliton is analysed. Numerical simulations have been performed for a variety of the magnetic parameters and the soliton characteristics.