Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 51: Magnetism Poster B

MA 51.37: Poster

Donnerstag, 4. April 2019, 15:00–18:00, Poster C

Transparent boundary conditions in micromagnetic simulations eliminate finite size effects — •Jan Masell — Institut für Theoretische Physik, Universität zu Köln, Köln, Deutschland

In systems where the magnetic texture varies on a considerably larger scale than the atomic lattice structure, effective micromagnetic models provide powerful approximations to the numerically too complex atomistic descriptions. However, even these effective models soon face the limits of numerical runtime or accuracy, in particular, when the considered effects require a long-ranged healing length. Common examples include the propagation of magnons through nanostructures, where a reflection and back-propagation from the end of the simulated area is usually suppressed by artificial absorbing boundary conditions but also the simulation of complex defects such as skyrmions or defects in a helical phase.

Here, I present my work on transparent boundary conditions which can be used in micromagnetic simulations to overcome the size limitations in these types of systems by effectively providing half-infinite boundary conditions.