Magnetic vortex core reversal by excitation of spin waves

Citations Over TimeTop 1% of 2011 papers

Abstract

Micron-sized magnetic platelets in the flux-closed vortex state are characterized by an in-plane curling magnetization and a nanometer-sized perpendicularly magnetized vortex core. Having the simplest non-trivial configuration, these objects are of general interest to micromagnetics and may offer new routes for spintronics applications. Essential progress in the understanding of nonlinear vortex dynamics was achieved when low-field core toggling by excitation of the gyrotropic eigenmode at sub-GHz frequencies was established. At frequencies more than an order of magnitude higher vortex state structures possess spin wave eigenmodes arising from the magneto-static interaction. Here we demonstrate experimentally that the unidirectional vortex core reversal process also occurs when such azimuthal modes are excited. These results are confirmed by micromagnetic simulations, which clearly show the selection rules for this novel reversal mechanism. Our analysis reveals that for spin-wave excitation the concept of a critical velocity as the switching condition has to be modified.

Related Papers

• → Spin-Wave Spin Current in Magnetic Insulators(2013)13 cited
• → Novel micromagnetics for high-temperature applications and modeling of ultra-fast laser-induced magnetization dynamics(2015)
• → Spintronics in Micromagnetics(2019)
• → Spintronics in Micromagnetics(2020)
• → Magnetization Dynamics of Ferromagnetic Nanostructures for Spintronics and Biomedical Applications(2023)