3-Dimensional magnetic vortices were discovered by scientists from the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Paul Scherrer Institute (PSI) within the scope of an international cooperation. The results were published in the scientific journal Physical Review Letters (DOI: 10.1103/PhysRevLett.110.177201). Vortex states are potential antennas for the ultrafast, wireless data transmission of tomorrow.
“So far, magnetic vortex states have been observed only in two dimensions; in other words: Within a plane,” explains Sebastian Wintz, physicist at the Helmholtz-Zentrum Dresden-Rossendorf. These magnetic vortices typically occur in nanometer-scale magnetic disks. Wintz has now investigated three-dimensional magnetic layer systems together with his colleagues from HZDR and the Swiss Paul Scherrer Institute: The researchers stacked two magnetic disks at a time, which were separated by a thin non magnetic metal layer, on top of each other. Due to this special design, all magnets surrounding the intermediate layer arrange themselves in equally oriented, three-dimensional vortices – an entirely new observation.
Magnetic vortices help researchers improve their fundamental understanding of magnetic materials. Yet they also offer very promising applications, for example, in information and communication technology. “Three-dimensional magnetic vortices could permit stable and high performance antennas for the ultrafast, wireless transmission of information, for example, in mobile communications or wi-fi,” says Wintz. The reason is revealed by a more detailed look into a single magnetic disk as well as the magnetic layer system produced at the HZDR.
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