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Open AccessArticle

Controlling the Transverse Magneto-Optical Kerr Effect in Cr/NiFe Bilayer Thin Films by Changing the Thicknesses of the Cr Layer

1
Department of Technology of Electronic Materials, National University of Science and Technology (MISIS), Moscow 119049, Russia
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Department of Physics, Faculty of Science, Tanta University, Tanta 31527, Egypt
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Russian Quantum Center, Skolkovo, Moscow Region 143025, Russia
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Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow 119991, Russia
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Institute of Physics, Mathematics and IT, Immanuel Kant Baltic Federal University, Kaliningrad 236041, Russia
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Institute of Physics, Czech Academy of Sciences, Prague 18221, Czech Republic
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Sumy State University, 2, Rimsky Korsakov Str., 40007 Sumy, Ukraine
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Institute of Physics, P.J. Šafárik University, 041 80 Košice, Slovak
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(2), 256; https://doi.org/10.3390/nano10020256
Received: 30 December 2019 / Revised: 21 January 2020 / Accepted: 28 January 2020 / Published: 1 February 2020
(This article belongs to the Special Issue Functional Nanomagnetics and Magneto-Optical Nanomaterials)
Here, we demonstrate the impact of ferromagnetic layer coating on controlling the magneto-optical response. We found that the transverse magneto-optical Kerr effect (TMOKE) signal and TMOKE hysteresis loops of Ni80Fe20 thin layers coated with a Cr layer show a strong dependence on the thickness of the Cr layer and the incidence angle of the light. The transmission and reflection spectra were measured over a range of incidence angles and with different wavelengths so as to determine the layers’ optical parameters and to explain the TMOKE behavior. The generalized magneto-optical and ellipsometry (GMOE) model based on modified Abeles characteristic matrices was used to examine the agreement between the experimental and theoretical results. A comprehensive theoretical and experimental analysis reveals the possibility to create a TMOKE suppression/enhancement coating at specific controllable incidence angles. This has potential for applications in optical microscopy and sensors. View Full-Text
Keywords: transverse magneto-optical Kerr effect (TMOKE); ferromagnetic coupling (FMC); suppression or enhancement of magneto-optical properties; magnetic nanostructure multilayers; reflectivity transverse magneto-optical Kerr effect (TMOKE); ferromagnetic coupling (FMC); suppression or enhancement of magneto-optical properties; magnetic nanostructure multilayers; reflectivity
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Hashim, H.; Kozhaev, M.; Kapralov, P.; Panina, L.; Belotelov, V.; Víšová, I.; Chvostová, D.; Dejneka, A.; Shpetnyi, I.; Latyshev, V.; Vorobiov, S.; Komanický, V. Controlling the Transverse Magneto-Optical Kerr Effect in Cr/NiFe Bilayer Thin Films by Changing the Thicknesses of the Cr Layer. Nanomaterials 2020, 10, 256.

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