We show how inhomogeneous spin polarizers in the form of vortices can result in self-sustained gyration of skyrmions in magnetic nanopillars. We suggest that such dynamics could be useful for skyrmion-based spin-torque nano-oscillators. This work has just appeared in the New Journal of Physics.
Our paper on moving vortices around using multiple nanocontacts has appeared in Nature Nanotechnology! There is an accompanying News & Views piece by Prof. Teruo Ono of Kyoto University.