Influence of Physical Symmetries on the Magnetization Dynamics in Magnetic Fibers

Magnetic nanofibers belong to the geometries which are intensively investigated in simulations and experiments due to their unique magnetic properties, varying in their lengths, cross-sections, and bending radii. Besides basic research of different magnetization reversal processes and magnetization dynamics in bent nanofibers, these structures are of potential interest for data storage applications, data transport, or other tasks in spintronics devices. While previous simulations concentrated on the domain wall transport through coupled bent nanofibers, creating networks with many in- and outputs to establish nanofiber-based domain wall logics, here we show the influence of the constricted area, in which a rotating magnetic field is applied in the middle of bent or straight magnetic nanofibers, on the magnetization dynamics. Our micromagnetic simulations, performed by Magpar, reveal a strong impact not only of this area, but also of the curvature of the nanofiber as well as of an additional Dzyaloshinskii-Moriya interaction (DMI).

Automated summary

Magnetic nanofibers with varying lengths, cross-sections, and bending radii have unique magnetic properties and are intensively studied in simulations and experiments. They have potential applications in data storage, data transport, and spintronics devices. This study focuses on the influence of a constricted area with a rotating magnetic field on the magnetization dynamics of bent or straight magnetic nanofibers, revealing the strong impact of the area, nanofiber curvature, and Dzyaloshinskii-Moriya interaction.