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MA: Fachverband Magnetismus
MA 15: Poster I
MA 15.44: Poster
Dienstag, 18. März 2025, 10:00–12:30, P1
Discretization Anisotropy In Micromagnetics — Samuel Holt1,2, •Andrea Petrocchi1,2, Martin Lang1,2, Swapneel Pathak1,2, and Hans Fangohr1,2,3 — 1Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761 Hamburg, Germany — 2Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany — 3Faculty of Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
Micromagnetics models the physics of magnetic systems using partial differential equations to express quantities such as the magnetization, energy density, and effective field. The discretization of these equation onto a regular lattice produces anisotropy. Its impact is extensive and includes phenomena such as the energy-minimizing rotation of magnetic structures, preferred directions, and creating artificial magnetization structures.
Despite this, the consequences of discretization anisotropy and how to mitigate against it are rarely discussed in the context of micromagnetics. A thorough understanding of these effects is important for the accurate interpretation of simulation results and for enhancing the overall fidelity of micromagnetic modeling. In this work we focus on these errors introduced by using finite difference approximations in micromagnetic simulations.
Funded by EU Horizon 2020, grants 101152613 and 101135546.
Keywords: Discretization anisotropy; Micromagnetic simulations; Numerical analysis; Finite differences