Magnetic vortices are curling magnetization structures formed in micro- and nanosized magnetic disks and polygons. They are known for having four different magnetization configurations (vortex states) that can be used for a multibit memory cell. We study dynamic magnetization processes of switching of the vortex states and we investigate the possibilities of writing two bits of information into a magnetic vortex. While most of the work has been done on planar structures, more recently we have been studying 3D vortices in micro- and nanosized spheres prepared by a combination of focused ion beam milling and electron beam induced deposition of Co (Co-C).
For further details, contact Michal Urbánek (michal.urbanek(at)ceitec.vutbr.cz).