Simulations of the dynamic switching of vortex chirality in magnetic nanodisks by a uniform field pulse

Abstract

We present a possibility to switch the chirality of a spin vortex occurring in a magnetic nanodisk by applying a uniform in-plane field pulse, based on optimizing its strength and duration. The related spin-dynamical process, investigated by micromagnetic simulations, consists of several stages. After applying the field, the original vortex is expelled from the disk, after which two C-shaped states oscillate between each other. The essence of the method is based on turning the field off at a suitably chosen moment for which the orientation of the C-state will evolve into the nucleation of a vortex with the desirable chirality. This idea simply uses the information about the original chirality present inside the nanodisk during the dynamic process before losing it in saturation, and can thus be regarded as analogous to the recent studies on the polarity switching.

In this version only small formal changes are made

References in corpus (6)

• Electrical switching of vortex core in a magnetic disk
• Dynamics of Vortex Core Switching in Ferromagnetic Nanodisks
• Current-induced magnetic vortex core switching in a Permalloy nanodisk
• Vortex polarity switching by a spin--polarized current
• Switching of the vortex polarity in a magnetic nanodisk by a DC current
• Controllable switching of vortex chirality in magnetic nanodisks by a field pulse

Cited by in corpus (6)

• Ultrafast switching of the electric polarization and magnetic chirality in BiFeO3 by an electric field
• Dynamics of Vortex Nucleation in Nanomagnets with Broken Symmetry
• Curvature effects in vortex chirality switching
• Large vortex state in ferromagnetic disks
• Commensurate vortex core switching in magnetic nanodisks at Gigahertz frequencies
• Analytical approximations to the core radius and energy of magnetic vortex in thin ferromagnetic disks