This paper reports on micromagnetic simulations investigating the spin-wave-driven dynamics of skyrmion tubes (SkTs) and chiral bobbers (ChBs) in thick magnetic films. The simulations predict tornado-like dynamics in both structures, characterized by lateral rotation of topological centers with distorted profiles in the thickness direction. SkT velocity scales with driving power, while ChB motion exhibits a threshold dependent on penetration length. This difference in behavior offers a potential method to experimentally distinguish ChBs from SkTs and estimate ChB penetration length.

Lei Qiu, Laichuan Shen, Ka Shen