Dipolar skyrmions and antiskyrmions of arbitrary topological charge at room temperature

Dipolar skyrmions and antiskyrmions of arbitrary topological charge at room temperature

25 January 2024 | Mariam Hassan, Sabri Koraltan, Aladin Ullrich, Florian Bruckner, Rostyslav O. Serha, Khrystyna V. Levchenko, Gaspare Varvaro, Nikolai S. Kiselev, Michael Heigl, Claas Albert, Dieter Suess & Manfred Albrecht
This study reports the direct observation of dipolar-stabilized skyrmions (SKs) and antiskyrmions (ASKs) with arbitrary topological charges in Co/Ni multilayers at room temperature. The researchers explored spin objects with topological charges up to 10, characterized their nucleation process, and investigated their energy dependence on the topological charge and the effect of material parameters on stability. Micromagnetic simulations demonstrated spin-transfer-induced motion of these spin objects, which is crucial for potential device applications. The work highlights the accessibility and stability of these spin textures at room temperature, opening new avenues for both fundamental and applied research in skyrmionic devices, including unconventional computing and new storage concepts. The findings contribute to the emerging field of skyrmions and provide a platform for further exploration of high-order spin objects.This study reports the direct observation of dipolar-stabilized skyrmions (SKs) and antiskyrmions (ASKs) with arbitrary topological charges in Co/Ni multilayers at room temperature. The researchers explored spin objects with topological charges up to 10, characterized their nucleation process, and investigated their energy dependence on the topological charge and the effect of material parameters on stability. Micromagnetic simulations demonstrated spin-transfer-induced motion of these spin objects, which is crucial for potential device applications. The work highlights the accessibility and stability of these spin textures at room temperature, opening new avenues for both fundamental and applied research in skyrmionic devices, including unconventional computing and new storage concepts. The findings contribute to the emerging field of skyrmions and provide a platform for further exploration of high-order spin objects.
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[slides and audio] Dipolar skyrmions and antiskyrmions of arbitrary topological charge at room temperature