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Domain wall motion in nanonstructures

The manipulation and control of magnetic domain walls (DWs) in ferromagnetic nanostructures has recently become a subject of intense experimental and theoretical research. The rapidly growing interest in the physics of the DW motion can be mainly explained by a promising possibility of using DWs as the basis for next-generation memory and logic devices.

In ferromagnetic nanostructures, the dynamics of the orientation of the magnetization distribution and, therefore DW motion, is described by the Landau-Lifshitz-Gilbert (LLG) equations. These equations have a variety of solutions corresponding to different micromagnetic regimes. This project involves investigation of LLG equations of micromagnetics. The questions we would like to address include: (a) classification of solutions of LLG; (b) stability of solutions of LLG; (c) controlling DW motion using external field and current, (d) influence of the domain geometry on the magnetization behaviour.

Collaborators: A. Goussev, (Northumbria, UK), C. Muratov (NJIT), J.M. Robbins (Bristol), O. Tretiakov (Tohoku, Japan)

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