Theory of Condensed Matter: Hard Condensed Matter

July 21, 2015 at 2:15 p.m. in Galilei Room

Prof. Dr. Jairo Sinova
Institut für Physik, SPICE

Magnetization dynamics in chiral spin textures: Spin wave channelling and skyrmion oscillations
Joo-Von Kim (Institut d'Electronique Fondamentale, CNRS and Univ. Paris-Sud)

Chiral symmetry can be broken in magnetic thin films and multilayers, leading to the appearance of an anisotropic exchange interaction of the Dzyaloshinskii-Moriya (DM) form. We have studied theoretically how the DM interaction can strongly modify measurable features of spin wave excitations in ultrathin films with perpendicular magnetic anisotropy. We will show how nonreciprocal channelling can appear in systems with domain walls, which has consequences for spin wave modes in confined geometries, such as strips and dots. We will also describe the breathing dynamics and current-driven oscillations of isolated skyrmions in ultrathin film dots.