Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 1: Tutorial: Micromagnetic Simulations

MA 1.2: Tutorium

Sonntag, 19. März 2017, 16:45–17:30, HSZ 401

Micromagnetics simulations with MicroMagnum and OMNeS — •Kai Litzius and Matthias Sitte — Institute of Physics, Johannes Gutenberg-Universität, 55128 Mainz, Germany

The open-source micromagnetics simulator package MicroMagnum is a collaborative effort of the University of Hamburg and JGU Mainz. Based on the phenomenological Landau-Lifschitz-Gilbert equation, its core is intimately connected to experiments, aiding in their interpretation and analysis. In its current version, MicroMagnum comes with a complete set of modules to describe phenomenologically magnetic systems in terms of exchange interaction, magnetocristalline anisotropies, external and magnetostatic fields, spin torques, etc. MicroMagnum has a robust and modular architecture that aims to combine the speed and flexibility of C++ together with the usability of the Python scripting language and allows to use both CPU- and GPU-based multithreaded computing, thereby gaining efficiency on regular grids compared to traditional packages such as OOMMF. It can be easily extended by the user through additional modules such as Dzyaloshinskii-Moriya interaction with arbitrary symmetries (to be released).

In the second part, we present OMNeS as a new, open source environment currently under development in the INSPIRE group at the JGU Mainz. OMNeS uses finite-element methods on unstructured grids as complementary approach to MicroMagnum, thereby allowing us to simulate large real-world devices capable of computing multiple device characteristics in a multi-scale and self-consistent manner.