Abstract
We report on the experimental investigations of the optical second harmonic generation and magnetooptical effects at the second-harmonic frequency in thin films consisting of ferromagnetic and antiferromagnetic materials and including exchange-coupled layers, one of which is pinned with an antiferromagnetic layer. The exchange coupling manifests itself in such structures as a shift of the hysteresis loops relative to the zero magnetic field under the linear magnetooptical Kerr effect. We show that this effect appears to a much less extent in the nonlinear magnetooptical Kerr effect at the second harmonic response. The magnetic field dependences of the second harmonic intensity contain a single magnetic hysteresis loop slightly shifted relative to the zero magnetic field and this shift increases with a decrease in the laser pumping radiation power.
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ACKNOWLEDGMENTS
This study was carried out on the equipment of the Center for Collective Use “Physics and Technology of Micro- and Nanostructures” of the Institute for Physics of Microstructures, Russian Academy of Sciences.
Funding
This study was supported by the Russian Science Foundation, project no. 19-72-20103 and the Foundation for the Advancement of Theoretical Physics and Mathematics “BASIS,” project no. 21-2-1-50-1.
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Translated by E. Bondareva
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Radovskaya, V.V., Maydykovskiy, A.I., Novikov, V.B. et al. Magnetic Field-Induced Second Harmonic Generation in Thin Films with Ferromagnet/Antiferromagnet Interfaces. Phys. Solid State 64, 330–334 (2022). https://doi.org/10.1134/S1063783422070083
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DOI: https://doi.org/10.1134/S1063783422070083