Magnetic vortices

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).

Related publications:

• M. Vaňatka et al.,: Magnetic vortex nucleation modes in static magnetic fields, AIP Advances 7 (10), 105103 (2017). DOI: 10.1063/1.5006235.
  
• Uhlíř et. al., Dynamic switching of the spin circulation in tapered magnetic nanodisks, Nature Nanotechnology 8, 341–346 (2013). DOI: 10.1038/nnano.2013.66.