Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: Poster I

MA 19.42: Poster

Dienstag, 1. April 2014, 13:00–15:30, P1

A Multi-Scale Approach to High Resolution Magnetization Dynamics Simulations — •Andrea De Lucia and Benjamin Krüger — Institut für Physik, Johannes Gutenberg - Universität, Mainz

Current simulation tools for magnetic nanostructures either base on the micromagnetic model or the Heisenberg spin model. While the former model is suitable for systems with micrometer size it cannot be realistically applied to systems involving magnetization patterns of an atomic size like thermal spin-waves, vortex switching, Bloch points, edge roughness and narrow domain walls. For such simulations the Heisenberg spin model is used. But with this model it is not possible to simulate systems that reach experimentally used sizes.

Multi-Scale approaches are a very well established method to perform simulations in statistical mechanics when the microscopic properties of a macroscopic system are concerned. In this work we use such an approach in magnetization dynamics, using a domain-partitioned model in order to solve the Landau-Lifshitz-Gilbert equation in a mesoscopic sample. For the implementation of these multiscale simulations the micromagnetic simulation tool MicroMagnum[1] is extended to include the Heisenberg spin model.

[1] http://micromagnum.informatik.uni-hamburg.de/