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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: Vortrag

Mittwoch, 19. März 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