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MA: Fachverband Magnetismus
MA 13: Micro- and Nanostructured Magnetic Materials
MA 13.2: Talk
Monday, March 18, 2024, 15:15–15:30, EB 407
Three-dimensional magnetic nanotextures — •Oleksii M. Volkov1, Oleksandr V. Pylypovskyi1,2, Fabrizio Porrati3, Florian Kronast4, Jose A. Fernandez-Roldan1, Attila Kákay1, Alexander Kuprava3, Sven Barth3, Filipp N. Rybakov5, Olle Eriksson5, Sebastian Lamb-Camarena6, Pavlo Makushko1, Mohamad-Assad Mawass4, Shahrukh Shakeel1, Oleksandr V. Dobrovolskiy6, Michael Huth3, and Denys Makarov1 — 1Helmholtz-Zentrum-Dresden-Rossendorf, Dresden, Germany — 2Kyiv Academic University, Kyiv, Ukraine — 3Johann Wolfgang Goethe-Universität Frankfurt am Main, Frankfurt am Main, Germany — 4Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany — 5Uppsala University, Uppsala, Sweden — 6University of Vienna, Faculty of Physics and Vienna Doctoral School in Physics, Vienna, Austria
Additive nanotechnologies enable curvilinear and three-dimensional (3D) magnetic architectures with tunable topology and functionalities surpassing their planar counterparts. Here, we reveal that 3D soft magnetic wireframe structures resemble compact manifolds and accommodate magnetic textures of high order vorticity determined by the Euler characteristic, χ: (i) self-standing tetrapods, χ=+2, support four vortices and two antivortices, with a total vorticity of +2; (ii) wireframe structures with one loop, χ = 0, possess equal number of vortices and antivortices; (iii) wireframe geometries with N holes, χ = 2(1−N), enable the accommodation of a virtually unlimited number of antivortices.
Keywords: Three-dimensional magnetic nanotextures; Additive nanotechnology; Euler characteristic; Magnetic wireframes