Three-dimensional magnetic nanotextures with high-order vorticity in soft magnetic wireframes

Autor(en)

Oleksii M. Volkov, Oleksandr V. Pylypovskyi, Fabrizio Porrati, Florian Kronast, Jose A. Fernandez-Roldan, Attila Kákay, Alexander Kuprava, Sven Barth, Filipp N. Rybakov, Olle Eriksson, Sebastian Lamb-Camarena, Pavlo Makushko, Mohamad Assaad Mawass, Shahrukh Shakeel, Oleksandr V. Dobrovolskiy, Michael Huth, Denys Makarov

Abstrakt

Additive nanotechnology enable curvilinear and three-dimensional (3D) magnetic architectures with tunable topology and functionalities surpassing their planar counterparts. Here, we experimentally reveal that 3D soft magnetic wireframe structures resemble compact manifolds and accommodate magnetic textures of high order vorticity determined by the Euler characteristic, χ. We demonstrate that self-standing magnetic tetrapods (homeomorphic to a sphere; χ = + 2) support six surface topological solitons, namely four vortices and two antivortices, with a total vorticity of + 2 equal to its Euler characteristic. Alternatively, wireframe structures with one loop (homeomorphic to a torus; χ = 0) possess equal number of vortices and antivortices, which is relevant for spin-wave splitters and 3D magnonics. Subsequent introduction of n holes into the wireframe geometry (homeomorphic to an n-torus; χ < 0) enables the accommodation of a virtually unlimited number of antivortices, which suggests their usefulness for non-conventional (e.g., reservoir) computation. Furthermore, complex stray-field topologies around these objects are of interest for superconducting electronics, particle trapping and biomedical applications.

Organisation(en)

Nanomagnetismus und Magnonik

Externe Organisation(en)

Helmholtz-Zentrum Dresden-Rossendorf, Kyiv Academic University, Johann Wolfgang Goethe-Universität Frankfurt am Main, Helmholtz-Zentrum Berlin für Materialien und Energie, Uppsala University

Journal

Nature Communications

Band

15

Anzahl der Seiten

13

ISSN

2041-1723

DOI

https://doi.org/10.1038/s41467-024-46403-8

Publikationsdatum

03-2024

Peer-reviewed

Ja

ÖFOS 2012

103017 Magnetismus, 103020 Oberflächenphysik, 210006 Nanotechnologie

ASJC Scopus Sachgebiete

Allgemeine Chemie, Allgemeine Biochemie, Genetik und Molekularbiologie, Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/40690995-f152-4e3e-ac2c-fc1f3b823cbb