Dresden 2026 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 44: Focus Session: Curvilinear magnetism: Magnetics with nanoscale curved geometries (joint session MA/TT)

MA 44.7: Vortrag

Donnerstag, 12. März 2026, 12:30–12:45, POT/0151

Magnetic solitons in spherical maghemite nanoshells — •Oleksandr V. Pylypovskyi¹, Gaspare Varvaro², Davide Peddis^2,3, Priyanka Mishra⁴, Carmine Autieri⁴, Filipp N. Rybakov⁵, Denis D. Sheka⁶, and Denys Makarov¹ — ¹Helmholtz-Zentrum Dresden-Rossendorf e.V., 01328 Dresden, Germany — ²CNR-Istituto di Struttura della Materia, 00015 Roma, Italy — ³Universitá degli Studi di Genova, 1-16146 Genova, Italy — ⁴International Research Centre Magtop, Institute of Physics, Polish Academy of Sciences, 02668 Warsaw, Poland — ⁵Uppsala University, Uppsala SE-751 20, Sweden — ⁶Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine

Topology of the shape of magnetic nanoarchitecture makes a major impact on global properties of its magnetic textures [1,2]. Here, we present a fabrication of maghemite spherical shells and a theoretical analysis of magnetic solitons they host in equilibrium. The ferrimagnetic shells with a radius and shell thickness of about 4 nm and 1.4 nm have a radial easy axis that favors skyrmionic textures. Their ground state corresponds to a 3D onion state with the change of the radial component of magnetization at the equator. In this presentation, we will also report on the localization of magnetic solitons on spherical shells.

[1] V. P. Kravchuk et al., PRB 94, 144402 (2016); [2] O. M. Volkov, O. V. Pylypovskyi et al., Nat. Commun., 15, 2193 (2024).

Keywords: spherical topology; ferrimagnets; magnetic solitons