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arXiv · 2110.13679

Giant quadratic magneto-optical response of thin YIG films for sensitive magnetometric experiments

E. Schmoranzerová·T. Ostatnický·J. Kimák·D. Kriegner·H. Reichlová·R. Schlitz·A. Baďura·Z. Šobáň·M. Münzenberg·G. Jakob·E. -J. Guo·M. Kläui·P. Němec
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Abstract

We report on observation of a magneto-optical effect quadratic in magnetization (Cotton-Mouton effect) in 50 nm thick layer of Yttrium-Iron Garnet (YIG). By a combined theoretical and experimental approach, we managed to quantify both linear and quadratic magneto-optical effects. We show that the quadratic magneto-optical signal in the thin YIG film can exceed the linear magneto-optical response, reaching values of 450 urad that are comparable with Heusler alloys or ferromagnetic semiconductors. Furthermore, we demonstrate that a proper choice of experimental conditions, particularly with respect to the wavelength, is crucial for optimization of the quadratic magneto-optical effect for magnetometry measurement.

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E. Schmoranzerová, T. Ostatnický, J. Kimák, D. Kriegner, H. Reichlová, R. Schlitz, A. Baďura, Z. Šobáň, M. Münzenberg, G. Jakob, E. -J. Guo, M. Kläui, P. Němec. 2021-10-26. Giant quadratic magneto-optical response of thin YIG films for sensitive magnetometric experiments. https://doi.org/10.1103/physrevb.106.104434

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