Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 12: Skyrmions I

MA 12.3: Vortrag

Montag, 18. März 2024, 15:30–15:45, EB 301

Current induced dynamics of skyrmions in synthetic antiferromagnets — •Venkata Krishna Bharadwaj, Ricardo Zarzuela, and Jairo Sinova — 1Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, D-55099 Mainz, Germany

Magnetic skyrmions, distinctive for their topological magnetic whirls and a trivial magnetization configuration at their boundary, exhibit a non-zero skyrmion Hall angle during current-driven dynamics, owing to their inherent topological nature in ferromagnets [1]. This characteristic poses a challenge for practical applications. However, this effect is suppressed for skyrmions in synthetic antiferromagnets (SAFs), due to the overall zero topological charge in SAFs [2]. Recent experimental observations of skyrmions at room temperature in SAFs [3] have opened up promising avenues for realizing extremely small and mobile skyrmions, crucial for various spintronic applications. This work investigates the current-driven dynamics of skyrmions in compensated SAFs, evaluating the impact of interlayer coupling and current strengths on the Hall angle. Additionally, the model is expanded to include ferrimagnets.

[1] K. Litzius et al., Nat. Phys. 13, 170 (2017). [2] X. Zhang et al, Nat. Commun. 7, 10293(2016) [3] T. Dohi et al, Nat. Commun. 10, 5153 (2019)