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MA: Fachverband Magnetismus
MA 15: Poster I
MA 15.4: Poster
Dienstag, 18. März 2025, 10:00–12:30, P1
Cubic magneto-optic Kerr effect in Ni(111) and Co(111) thin films depending on the angle of incidence — •Malte Schaeffer1, Maik Gaerner1, Robin Silber2, Jaroslav Hamrle3, Martin Wortmann4, Andrea Ehrmann4, and Timo Kuschel1 — 1Bielefeld University, Germany — 2VSB-Technical University of Ostrava, Czechia — 3Charles University Prague, Czechia — 4Bielefeld University of Applied Science and Arts, Germany
The magneto-optic Kerr effect (MOKE) describes the change in polarization of linear polarized light when reflected from a magnetized sample. It can be utilized to investigate magnetic properties of thin films and microstructures. In most cases, only the linear dependence on the magnetization M and sometimes the quadratic contribution depending on M2 (QMOKE) are studied [1,2]. The third-order MOKE, so-called cubic MOKE (CMOKE), has only been studied recently [3,4]. In order to separate the individual MOKE contributions, the eight-directional method is used by applying an external magnetic field in eight different in-plane directions. In this contribution, we measured QMOKE and CMOKE in ferromagnetic Ni(111) and Co(111) thin films for different angles of incidence ranging from 45∘ to normal. We compared the findings with theoretical predictions based on Yeh’s matrix formalism.
[1] R. Silber et al., Phys. Rev. B 100, 064403 (2019)
[2] R. Silber et al., Appl. Phys. Lett. 116, 262401 (2020)
[3] M. Gaerner et al., Phys. Rev. Applied 22, 024066 (2024)
[4] See Focus Session ’Magneto-transport and magneto-optics of higher orders in magnetization’ at DPG Meeting 2025 in Regensburg
Keywords: magnetooptic Kerr effect; MOKE; higher order effects; quadratic MOKE; magnetic thin films