Imaging antiferromagnets with a single spin magnetometer


A consortium of research groups from the Universti√© de Montpellier, Universit√© Paris-Saclay, Universit√§t Basel, CEA Saclay, and the Synchrotron SOLEIL has demonstrated the first real-space imaging of antiferromagnetic spin spirals in the multiferroic material bismuth iron oxide. The technique involves quantum sensing with a single spin magnetometer. A nice overview of this work can be […]

Spin Wave Power Flow and Caustics in Ultrathin Ferromagnets with the Dzyaloshinskii-Moriya Interaction


Reference: J.-V. Kim, R. L. Stamps, and R. E. Camley, Phys. Rev. Lett. 117, 197204 (2016). 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 […]

Role of nonlinear anisotropic damping in the magnetization dynamics of topological solitons


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. […]

Narrow Magnonic Waveguides Based on Domain Walls


Reference: F. Garcia-Sanchez et al., Phys. Rev. Lett. 114, 247206 (2015). By using spin wave theory and micromagnetics simulations, we have shown that localized eigenmodes of magnetic domain walls can act as efficient waveguides for spin waves in ultrathin films. This work has just appeared in Physical Review Letters. Last modified 23/06/15