Regensburg 2019 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 21: Magnetic textures: Transport and dynamics I

MA 21.2: Vortrag

Dienstag, 2. April 2019, 14:15–14:30, H38

Photoinduced magnetization dynamics in the skyrmion-host lacunar spinel GaV4S8 — •Fumiya Sekiguchi¹, Vladimir Tsurkan², István Kézsmárki², and Paul H. M. van Loosdrecht¹ — ¹Institute of Physics 2, University of Cologne, 50937 Cologne, Germany — ²Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany

Skyrmions are particle-like non-trivial spin textures with an intriguing topological nature. GaV4S8 is a multiferroic lacunar spinel hosting cycloid and Néel-type skyrmion magnetic ground states, in addition to a ferromagnetic state. Using time resolved magneto-optical Kerr effect experiments we have studied the magnetization dynamics in the ordered magnetic phases of this material induced by ultrafast modulation of the optical anisotropy. In this contribution we will focus on the change of the coherent spin precession and demagnetization dynamics across the phase transition among cycloid, skyrmion lattice and ferromagnetic phases.