Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 20: Poster I

MA 20.30: Poster

Dienstag, 19. März 2024, 16:30–19:00, Poster A

Stabilization of magnetic hopfions in bulk magnets — •Sandra Chulliparambil Shaju¹, Ross Knapman¹, Maria Azhar¹, Riccardo Hertel², and Karin Everschor-Sitte¹ — ¹Faculty of Physics and CENIDE, University of Duisburg-Essen, 47057 Duisburg, Germany — ²Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, F-67000 Strasbourg, France

Advanced nanofabrication techniques and novel 3D magnetization visualization methods have inspired significant research in 3D nano-magnetism, uncovering intriguing nanostructures and physics beyond the realms of 1D and 2D. A fascinating discovery arising from this exploration is that of magnetic hopfions, three-dimensional topological magnetic textures [1,2,3]. In references [4,5] the stabilization of magnetic Hopfions through higher-order exchange interactions in bulk magnets has been proposed. We investigate theoretically the influence of the different model parameters on the Hopfion properties for Hopfions stabilized by such higher-order exchange interactions. We further look for novel Hopfion stabilization mechanisms.

References:

[1] P. Sutcliffe, Phys. Rev. Lett. 118 (2017)

[2] Y. Liu, et al., Phys. Rev. B 98 (2018)

[3] F. Zheng, et al., Nature 623 (2023)

[4] F. N. Rybakov, et al., APL Mat. 210 (2022)

[5] M. Sallermann, et al., Phys. Rev. B 107(2023)

Keywords: Magnetic Hopfions; Three-dimensional nano-structures; Higher-order exchange