Dipolar skyrmions and antiskyrmions of arbitrary topological charge at room temperature

Autor(en)

Mariam Hassan, Sabri Koraltan, Aladin Ullrich, Florian Bruckner, Rostyslav O. Serha, Khrystyna V. Levchenko, Gaspare Varvaro, Nikolai S. Kiselev, Michael Heigl, Claas Abert, Dieter Suess, Manfred Albrecht

Abstrakt

Magnetic skyrmions are localized, stable topological magnetic textures that can move and interact with each other like ordinary particles when an external stimulus is applied. The efficient control of the motion of spin textures using spin-polarized currents opened an opportunity for skyrmionic devices such as racetrack memory and neuromorphic or reservoir computing. The coexistence of skyrmions with high topological charge in the same system promises further possibilities for efficient technological applications. In this work, we directly observe dipolar skyrmions and antiskyrmions with arbitrary topological charge in Co/Ni multilayers at room temperature. We explore the dipolar-stabilized spin objects with topological charges of up to 10 and characterize their nucleation process, their energy dependence on the topological charge and the effect of the material parameters on their stability. Furthermore, our micromagnetic simulations demonstrate spin-transfer-induced motion of these spin objects, which is important for their potential device application.

Organisation(en)

Forschungsplattform MMM Mathematics-Magnetism-Materials, Physik Funktioneller Materialien, Nanomagnetismus und Magnonik

Externe Organisation(en)

Universität Augsburg, Consiglio Nazionale delle Ricerche, EURATOM Association

Journal

Nature Physics

Band

20

Seiten

615-622

Anzahl der Seiten

8

ISSN

1745-2473

DOI

https://doi.org/10.1038/s41567-023-02358-z

Publikationsdatum

2024

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103017 Magnetismus, 103008 Experimentalphysik, 103043 Computational Physics

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/7e4e6bcf-537a-4268-b3fb-9e9f455bc21b