SKM 2023 – scientific programme

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MA: Fachverband Magnetismus

MA 40: Poster Magnetism II

MA 40.51: Poster

Thursday, March 30, 2023, 14:00–16:00, P2/EG

Light-poling of antiferromagnetic domains in a magnetoelectric LiCoPO₄ — •Jakub Vit^1,2, Oleksiy Pashkin³, Vilmos Kocsis⁴, Yasujiro Taguchi⁵, Istvan Kezsmarki⁶, and Sandor Bordacs¹ — ¹Budapest University of Technology and Economics, Hungary — ²Institute of Physics, Czech Academy of Sciences, Czechia — ³Helmholtz-Zentrum Dresden-Rossendorf, Germany — ⁴Institut für Festkörperforschung, Leibniz IFW-Dresden, Germany — ⁵RIKEN Center for Emergent Matter Science (CEMS), Japan — ⁶University of Augsburg, Germany

We selected antiferromagnetic domains in a magnetoelectric LiCoPO₄ single crystal by illuminating the sample by light while cooling through the Néel temperature. The experimental results and symmetry analysis indicate that the thermal gradient and resulting heat flow are responsible for such a novel effect: Propagation of thermally-activated quasi-particles is nonequivalent in different antiferromagnetic domains. The microscopic mechanism behind the observed effect is not clear at the moment, calling for future theoretical modeling.