Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 32: Micromagnetism and computational magnetics
MA 32.3: Vortrag
Mittwoch, 14. März 2018, 15:30–15:45, H 0112
Spirit: a modern framework for spin dynamics — •Gideon P Müller1,2, Nikolai Kiselev1, Stefan Blügel1, and Hannes Jónsson2 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany — 2Science Institute of the University of Iceland, VR-III, 107 Reykjavík, Iceland
Spin simulations using atomistic models have great importance in theoretical work on solid state magnetism, as they provide valuable predictions and help interpret experimental data. We present our framework of modern cross-platform computational tools for atomistic spin dynamics providing direct user interaction and powerful real-time visualisations. It is designed to increase scientific productivity by simplifying workflows and to minimize time spent on problem-specific programming. Through live visual feedback and parameter control, the time needed to study and understand properties and dynamics of a system is significantly reduced. Thanks to simplified programming interfaces (C/C++ or Python), time- consuming or repetitive tasks can be executed e.g. on a cluster, as all steps taken in the graphical user interface can be easily reproduced.
The framework is the ideal tool for the simulation of localized magnetic objects, such as magnetic skyrmions, chiral bobbers and complex domain walls. Its capabilities include Landau-Lifshitz-Gilbert dynamics simulations and direct energy minimization, as well as the calculation of minimum energy paths and energy barriers for transitions between states, using the geodesic nudged elastic band method.