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.
We examined how the Dzyaloshinskii-Moriya interaction (DMI) influences the flow of spin waves in ultrathin films using analytical theory and micromagnetics simulations. With a point source field excitation, we find a number of different propagation regimes, such as caustics and interference patterns that are asymmetric as a result of the DMI. This work has just appeared in Physical Review Letters.
Our European project MAGicSKy on magnetic skyrmions is well underway with project leaders and participants from the consortium gathering in Massy this week for the inaugural project meeting.
This FET-Open project is funded by the Horizon2020 Framework Programme of the European Union and will run through to September 2018.
Reference: J.-V. Kim, Phys. Rev. B 92, 014418 (2015).
By including the Rashba interaction into a model for nonlinear feedback damping, I studied how the dynamics of magnetic solitons, such as domain walls, vortices, and skyrmions, might be affected by additional torques resulting from this damping. This work has just appeared in Physical Review B.
By using analytical theory and micromagnetics simulations, we helped to explain experimental observations of an asymmetry in current-induced magnetization switching in ultrathin CoFeB/MgO films. This work has just appeared in Physical Review B.