Constructing coarse-grained skyrmion potentials from experimental data with Iterative Boltzmann Inversion
Journal article, 2023

In an effort to understand skyrmion behavior on a coarse-grained level, skyrmions are often described as 2D quasiparticles evolving according to the Thiele equation. Interaction potentials are the key missing parameters for predictive modeling of experiments. Here, the Iterative Boltzmann Inversion technique commonly used in soft matter simulations is applied to construct potentials for skyrmion-skyrmion and skyrmion-magnetic material boundary interactions from a single experimental measurement without any prior assumptions of the potential form. It is found that the two interactions are purely repulsive and can be described by an exponential function for micrometer-sized skyrmions in a ferromagnetic thin film multilayer stack. This captures the physics on experimental length and time scales that are of interest for most skyrmion applications and typically inaccessible to atomistic or micromagnetic simulations.

Author

Yuqing Ge

Johannes Gutenberg University Mainz

Chalmers, Physics, Materials Physics

Jan Rothörl

Johannes Gutenberg University Mainz

Maarten A. Brems

Johannes Gutenberg University Mainz

Nico Kerber

Johannes Gutenberg University Mainz

Raphael Gruber

Johannes Gutenberg University Mainz

Takaaki Dohi

Johannes Gutenberg University Mainz

Mathias Kläui

Johannes Gutenberg University Mainz

Peter Virnau

Johannes Gutenberg University Mainz

Communications Physics

23993650 (eISSN)

Vol. 6 1 30

Subject Categories

Other Physics Topics

Other Materials Engineering

Condensed Matter Physics

DOI

10.1038/s42005-023-01145-9

More information

Latest update

2/15/2023