Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 27: Focus Session: Magneto-Transport and Magneto-Optics of Higher Orders in Magnetization II
MA 27.2: Talk
Wednesday, March 19, 2025, 15:15–15:30, H18
Orthogonal faraday effect in garnet — •Haolin Pan1, Han Li2, Qinhui Yang2, and Dazhi Hou1 — 1University of Science and Technology of China, Hefei, China. — 2University of Electronic Science and Technology of China, Chengdu, China.
Faraday effect, a transmissive magneto-optical phenomenon with a long history and diverse applications, has been be confined within parallel configuration between light and magnetization in experiments. This routine originates from the common assumption that the asymmetric components of dielectric tensor is in linear response to magnetization. However, our experiments in garnet materials reveal the nonlinear nature of Faraday effect with respect to magnetization orientation, which allows the orthogonal geometry between light and magnetization. The lattice angular dependence and spectroscopy results are in good agreement with theory of multipole structures of Berry curvatures in magnetization space. The observation of orthogonal Faraday effect provides new opportunities for magneto-optical studies and applications.
Keywords: faraday effect; berry curvature; magneto-optics; garnet; spectroscopy