Dresden 2026 – scientific programme

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MA: Fachverband Magnetismus

MA 7: Poster Magnetism I

MA 7.71: Poster

Monday, March 9, 2026, 09:30–12:30, P2

Parameter-Dependent Stability of Magnetic Hopfions — •Niklas Oettgen, Sandra C. Shaju, Maria Azhar, and Karin Everschor-Sitte — Faculty of Physics, University of Duisburg-Essen, Duisburg, Germany

Hopfions are three-dimensional topologically protected magnetic textures that can be considered as closed loops of twisted skyrmion strings. We implement a model of spatially varying Dzyaloshinskii-Moriya interactions in micromagnetic simulations to explore Hopfion stability across a range of external magnetic fields and uniaxial anisotropies. Our simulations identify a clear regime in which the Hopfion remains metastable, and give insight into the conditions required for their formation and robustness.

Keywords: Topology; Hopfions; Magnetic Knots; Three-Dimensional Magnetic Textures; Nanomagnetism