Regensburg 2025 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 15: Poster I

MA 15.13: Poster

Dienstag, 18. März 2025, 10:00–12:30, P1

Micromagnetic Simulations of Domain Wall Dynamics in Chiral Nanostructures — •Iason-Konstantinos Douveas¹, Pamela Morales Fernandez^{1, 8}, Sandra Ruiz- Gómez³, Elina Zhakina², Sebastian Wintz⁴, Markus König², Aurelio Hierro Rodríguez⁵, Simone Finizio⁶, Luke Turnbull², Naëmi Leo⁷, Dieter Suess¹, Amalio Fernández-Pacheco⁸, Claire Donnelly^{2, 9}, and Claas Abert¹ — ¹Faculty of Physics, University of Vienna, Austria — ²Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — ³ALBALBA Synchrotron Light Source, CELLS, Spain — ⁴Helmholtz Zentrum Berlin BESSY II, Germany — ⁵CINN CSIC, University of Oviedo, Spain — ⁶Paul Scherrer Institut, Swiss Light Source, Switzerland — ⁷Loughborough University, United Kingdom — ⁸Institute of Applied Physics, University of Vienna, Austria — ⁹International Institute for Sustainability with Knotted Matter, Japan

We investigate domain wall (DW) eigenmodes in three-dimensional chiral magnetic nanostructures through micromagnetic simulations using the finite-element method. Our study focuses on double helices under external magnetic fields, examining the relationship between DW behavior and structural parameters. We employ two computational approaches: a small-scale model for extensive parameter space exploration and a larger structure matching experimental specimens. By implementing X-ray magnetic circular dichroism simulations, we provide direct comparison with experimental data, offering insights into DW mechanics in curved geometries.

Keywords: domain wall; magnetic nanostructures; micromagnetic simulations; chiral structure; XMCD