Regensburg 2025 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MA: Fachverband Magnetismus

MA 15: Poster I

MA 15.23: Poster

Tuesday, March 18, 2025, 10:00–12:30, P1

Coupled dynamic modes of a skyrmion chain in a synthetic antiferromagnet (SAF) — •Kauser Zulfiqar^{1, 2, 3}, Samuel Holt^{1, 3}, Martin Lang^{1, 3}, Swapneel Amit Pathak^{1, 3}, and Hans Fangohr^{1, 3, 4} — ¹Max Planck Institute for the Structure and Dynamics of the Matter, Hamburg, Germany. — ²University of Hamburg, Hamburg, Germany. — ³Center for Free Electron Laser, Hamburg, Hamburg, Germany. — ⁴University of Southampton, Southampton, United Kingdom.

Synthetic antiferromagnets (SAFs) are multilayer structures with ferromagnetic layers coupled via RKKY interaction [1]. Skyrmions in SAFs are smaller than in ferromagnetic systems, and studying their modes provides insights into their dynamics and stability, enhancing their potential for spintronic devices [2].

In this work, we expand on previous studies of skyrmion dynamics in circular geometries [3] by exploring a chain of Néel-type skyrmions in a rectangular strip using finite-difference micromagnetic simulations [4]. We use the ringdown method to excite the system with a sinc pulse. Through Fourier analysis, we identify individual modes and observe hybrid and coupled breathing modes among layers.

This work is funded by Marie Skłodowska-Curie (grant 101152613), MaMMoS (Horizon Europe, grant 101135546), and HEC-DAAD (ID 57630247).

[1]. Physical Review B 94, 064406 (2016) [2]. Applied Physics Letters 118, 082403 (2021) [3]. Physical Review B 102, 104403 (2020) [4]. IEEE Transactions on Magnetics 58, 1-5 (2022)

Keywords: Skyrmions; Synthetic antiferromagnets; Coupled breathing modes; Ringdown method; Micromagnetic simulations