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Fizika Tverdogo Tela, 2022 Volume 64, Issue 9, Pages 1351–1355 (Mi ftt11139)

XXVI International Symposium "Nanophysics and Nanoelectronics", Nizhny Novgorod, March 14 - March 17, 2022
Magnetism

Magnetization induced second harmonic generation in thin films with ferromagnet/antiferromagnet interfaces

V. V. Radovskayaa, A. I. Maidykovskiia, V. B. Novikova, D. A. Kopylova, N. S. Gusevbc, I. Yu. Pashen'kinb, T. V. Murzinaa

a Lomonosov Moscow State University, Moscow, Russia
b Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia
c National Research Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia

Abstract: We experimentally studied the generation of optical second harmonic (SH) and magneto-optical effects at the SH frequency in thin films consisting of ferromagnetic and antiferromagnetic materials, including exchange-bonded layers, one of which is pinned with an antiferromagnetic layer. As expected, the loops of the linear magneto-optical Kerr effect are shifted relative to the zero magnetic field value, which reflects the presence of a pronounced exchange interaction in such structures. It is shown that in the case of the nonlinear Kerr magneto-optical effect this effect is also present, but it is significantly smaller than in the nonlinear case, and leads to the observation of only one hysteresis loop instead of two. The studied dependence of the magneto-optical response at the TH frequency on the probing laser radiation power demonstrates that its growth leads to a decrease in the magnetic hysteresis loop shift of the TH.

Keywords: magnetization-induced SHG, ferromagnet/antiferromagnet interface, pinned structure, thin films.

Received: 29.04.2022
Revised: 29.04.2022
Accepted: 12.05.2022

DOI: 10.21883/FTT.2022.09.52832.48HH



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