Controlled vortex core switching in a magnetic nanodisk by a rotating field (original) (raw)

The article investigates the switching dynamics of the vortex core in a Permalloy nanodisk influenced by a rotating magnetic field, employing micromagnetic simulations for analysis. It reveals that vortex core polarity can be flipped under specific parameters of the rotating field, indicating potential applications in high-density magnetic storage and memory technologies. The work highlights the importance of internal magnon modes and dipolar interactions in the dynamics, leading to the generation of vortex-antivortex pairs and establishing a fundamental understanding of vortex behaviors under periodic driving.