Regular and chaotic vortex core reversal by a resonant perpendicular magnetic field
Oleksandr V. Pylypovskyi, Denis D. Sheka, Volodymyr P. Kravchuk, and Franz G. Mertens, Yuri Gaididei
TL;DR
This paper investigates how an alternating perpendicular magnetic field can switch the vortex core polarity in nanodisks, revealing both regular and chaotic dynamics and providing an analytical model for control.
Contribution
It introduces a simplified analytical model to describe vortex core dynamics under resonant magnetic fields, highlighting conditions for controllable polarity switching.
Findings
Vortex polarity can be switched efficiently using an alternating perpendicular magnetic field.
The dynamics of vortex polarity can be regular or chaotic depending on conditions.
An analytical reduced vortex core model accurately describes the switching behavior.
Abstract
Under the action of an alternating perpendicular magnetic field the polarity of the vortex state nanodisk can be efficiently switched. We predict the regular and chaotic dynamics of the vortex polarity and propose simple analytical description in terms of a reduced vortex core model. Conditions for the controllable polarity switching are analyzed.
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