Magnetization dynamics T400 slower

Перенесено с оригинальная дата публикации 27 марта 2012 This is magnetization dynamics simulation using my new program called yaLLGs yet another Landau-Lifshitz-Gilbert simulator. We start with horizontally along X axis magnetized slab and simulate the influence of time-varying uniform magnetic field HxMs Cos2 Pi tT where Ms is the saturation magnetization. The period T is 400 characteristic times unit of time renormalizing the gyromagnetic ration to 1 equal to 5.656ps for Permalloy. The slab has dimensions 50x50x5 exchange lengths discretized into 200x200x1 finite elements. The texture is tangential to the in-plane components of magnetization the color map shows the local energy density from blue the lowest to red the highest. You can see a lot of micro- and nano-magnetics: domains domain walls simple and charged cross-ties spin waves creation and annihilation accompanied by bursts of spin waves of vortices and anti-vortices scattering of spin-waves by domain walls and solitons magnon-magnon interactions and more sub-micron scale drama... -,

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