Regensburg 2016 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 9: Focus Session: Skyrmions meet Multiferroicity
DF 9.4: Vortrag
Mittwoch, 9. März 2016, 10:50–11:10, H25
Real-space inspection of Skyrmion lattices with confined orientation in the multiferroic semiconductor GaV4S8 — •Erik Neuber1, Peter Milde1, Istvan Kézsmárki2, and Lukas Eng1 — 1Institut für Angewandte Physik, TU Dresden, D-01069 Dresden, Germany — 2Department of Physics, Budapest University of Technology and Economics and MTA-BME Lendület Magneto-optical Spectroscopy Research Group, 1111 Budapest, Hungary
Following early predictions, skyrmion lattices (SkL) constituting a periodic array of spin vortices have now been reported to exist in various magnetic crystals mostly with chiral structure. Although non-chiral but polar crystals with Cnv symmetry were identified as ideal SkL hosts, this archetype of SkL has remained experimentally unexplored. In this contribution, we report on the discovery and real-space exploitation of a SkL in the multiferroic polar magnetic semiconductor GaV4S8 (GVS) that possesses rhombohedral (C3v) symmetry and easy axis anisotropy [1]. The SkL exists over an unusally broad temperature range compared to other bulk SkL crystals, while the orientation of vortices is pinned along the magnetic easy axis and can not be controlled via external magnetic fields. Our investigation focuses on the real-space inspection of SkL in GVS using various scanning probe techniques.
[1] Kézsmarki et al., Nature Materials 14, 1116-1122 (2015)