Vortex core switching by coherent excitation with single in-plane magnetic field pulses

TL;DR

This paper demonstrates a reliable method for switching vortex core magnetization states in nano-scale magnets using coherent in-plane magnetic field pulses, with experimental validation and micromagnetic simulation comparison.

Contribution

It introduces a new switching technique using coherent excitation with in-plane magnetic pulses and validates it through time-resolved x-ray microscopy and simulations.

Findings

Reliable vortex core switching achieved with in-plane magnetic pulses.

Switching process confirmed by time-resolved x-ray microscopy.

Micromagnetic simulations agree with experimental results.

Abstract

The bistability of the core magnetization of nano-scaled magnets with a magnetic vortex configuration has great potential for data storage applications. To exploit this, reliable switching between the two possible states is needed. Time resolved x-ray microscopy was used to study the response of the vortex core to excitation pulses at sub-ns timescales and image the vortex core switching. A reliable switching process by coherent excitation with leading and trailing edges of in-plane magnetic field pulses was found and compared with micromagnetic simulations.