April 2024 | 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
This study reports the direct observation of dipolar-stabilized skyrmions (SKs) and antiskyrmions (ASKs) with arbitrary topological charge at room temperature in Co/Ni multilayers. The researchers observed SKs and ASKs with topological charges ranging from Q = -5 to Q = 5, demonstrating their stability and coexistence. The magnetic textures were characterized using Lorentz transmission electron microscopy (LTEM) and micromagnetic simulations. The results show that these spin objects can be stabilized by dipolar interactions and are stable at room temperature, offering new possibilities for technological applications. The study also reveals that the energy of these spin objects depends on their topological charge and that their stability can be tuned by adjusting material parameters. The findings suggest that dipolar-stabilized SKs and ASKs with arbitrary topological charge could be useful for future skyrmionic devices, including neuromorphic computing and data storage. The research highlights the potential of these spin objects for both fundamental and applied research in the field of skyrmionics.This study reports the direct observation of dipolar-stabilized skyrmions (SKs) and antiskyrmions (ASKs) with arbitrary topological charge at room temperature in Co/Ni multilayers. The researchers observed SKs and ASKs with topological charges ranging from Q = -5 to Q = 5, demonstrating their stability and coexistence. The magnetic textures were characterized using Lorentz transmission electron microscopy (LTEM) and micromagnetic simulations. The results show that these spin objects can be stabilized by dipolar interactions and are stable at room temperature, offering new possibilities for technological applications. The study also reveals that the energy of these spin objects depends on their topological charge and that their stability can be tuned by adjusting material parameters. The findings suggest that dipolar-stabilized SKs and ASKs with arbitrary topological charge could be useful for future skyrmionic devices, including neuromorphic computing and data storage. The research highlights the potential of these spin objects for both fundamental and applied research in the field of skyrmionics.