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Interface Driven Effects in Magnetization-Induced Optical Second Harmonic Generation in Layered Films Composed of Ferromagnetic and Heavy Metals

Properties of nanolayers can substantially differ from those of bulky materials, in part due to pronounced interface effects. It is known that combinations of layers of heavy and ferromagnetic metals leads to the appearance of specific spin textures induced by interface-induced Dzyaloshinskyi–Moria...

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Autores principales: Mamonov, Evgeniy, Kolmychek, Irina, Radovskaya, Victoria, Pashen’kin, Igor, Gusev, Nikita, Maydykovskiy, Anton, Temiryazeva, Marina, Temiryazev, Alexei, Murzina, Tatiana
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8269653/
https://www.ncbi.nlm.nih.gov/pubmed/34206723
http://dx.doi.org/10.3390/ma14133573
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author Mamonov, Evgeniy
Kolmychek, Irina
Radovskaya, Victoria
Pashen’kin, Igor
Gusev, Nikita
Maydykovskiy, Anton
Temiryazeva, Marina
Temiryazev, Alexei
Murzina, Tatiana
author_facet Mamonov, Evgeniy
Kolmychek, Irina
Radovskaya, Victoria
Pashen’kin, Igor
Gusev, Nikita
Maydykovskiy, Anton
Temiryazeva, Marina
Temiryazev, Alexei
Murzina, Tatiana
author_sort Mamonov, Evgeniy
collection PubMed
description Properties of nanolayers can substantially differ from those of bulky materials, in part due to pronounced interface effects. It is known that combinations of layers of heavy and ferromagnetic metals leads to the appearance of specific spin textures induced by interface-induced Dzyaloshinskyi–Moria interaction (DMI), which attracts much interest and requires further studies. In this paper, we study magneto-optical effects in two- and three-layer films composed of a few nanometer thick Co layer adjacent to nanofilms of non-magnetic materials (Pt, W, Cu, Ta, MgO). For experimental studies of the interface magnetization-induced effects, we used the optical second harmonic generation (SHG) technique known for its high sensitivity to the symmetry breaking. We found that the structural asymmetry leads to the increase of the averaged SHG intensity, as well as to the magnetic field-induced effects in SHG. Moreover, by choosing the proper geometry of the experiment, we excluded the most studied linear in magnetization SHG contributions and, thus, succeeded in studying higher order in magnetization and non-local magnetic effects. We revealed odd in magnetization SHG effects consistent with the phenomenological description involving inhomogeneous (gradient) magnetization distribution at interfaces and found them quite pronounced, so that they should be necessarily taken into account when analyzing the non-linear magneto-optical response of nanostructures.
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spelling pubmed-82696532021-07-10 Interface Driven Effects in Magnetization-Induced Optical Second Harmonic Generation in Layered Films Composed of Ferromagnetic and Heavy Metals Mamonov, Evgeniy Kolmychek, Irina Radovskaya, Victoria Pashen’kin, Igor Gusev, Nikita Maydykovskiy, Anton Temiryazeva, Marina Temiryazev, Alexei Murzina, Tatiana Materials (Basel) Article Properties of nanolayers can substantially differ from those of bulky materials, in part due to pronounced interface effects. It is known that combinations of layers of heavy and ferromagnetic metals leads to the appearance of specific spin textures induced by interface-induced Dzyaloshinskyi–Moria interaction (DMI), which attracts much interest and requires further studies. In this paper, we study magneto-optical effects in two- and three-layer films composed of a few nanometer thick Co layer adjacent to nanofilms of non-magnetic materials (Pt, W, Cu, Ta, MgO). For experimental studies of the interface magnetization-induced effects, we used the optical second harmonic generation (SHG) technique known for its high sensitivity to the symmetry breaking. We found that the structural asymmetry leads to the increase of the averaged SHG intensity, as well as to the magnetic field-induced effects in SHG. Moreover, by choosing the proper geometry of the experiment, we excluded the most studied linear in magnetization SHG contributions and, thus, succeeded in studying higher order in magnetization and non-local magnetic effects. We revealed odd in magnetization SHG effects consistent with the phenomenological description involving inhomogeneous (gradient) magnetization distribution at interfaces and found them quite pronounced, so that they should be necessarily taken into account when analyzing the non-linear magneto-optical response of nanostructures. MDPI 2021-06-26 /pmc/articles/PMC8269653/ /pubmed/34206723 http://dx.doi.org/10.3390/ma14133573 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mamonov, Evgeniy
Kolmychek, Irina
Radovskaya, Victoria
Pashen’kin, Igor
Gusev, Nikita
Maydykovskiy, Anton
Temiryazeva, Marina
Temiryazev, Alexei
Murzina, Tatiana
Interface Driven Effects in Magnetization-Induced Optical Second Harmonic Generation in Layered Films Composed of Ferromagnetic and Heavy Metals
title Interface Driven Effects in Magnetization-Induced Optical Second Harmonic Generation in Layered Films Composed of Ferromagnetic and Heavy Metals
title_full Interface Driven Effects in Magnetization-Induced Optical Second Harmonic Generation in Layered Films Composed of Ferromagnetic and Heavy Metals
title_fullStr Interface Driven Effects in Magnetization-Induced Optical Second Harmonic Generation in Layered Films Composed of Ferromagnetic and Heavy Metals
title_full_unstemmed Interface Driven Effects in Magnetization-Induced Optical Second Harmonic Generation in Layered Films Composed of Ferromagnetic and Heavy Metals
title_short Interface Driven Effects in Magnetization-Induced Optical Second Harmonic Generation in Layered Films Composed of Ferromagnetic and Heavy Metals
title_sort interface driven effects in magnetization-induced optical second harmonic generation in layered films composed of ferromagnetic and heavy metals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8269653/
https://www.ncbi.nlm.nih.gov/pubmed/34206723
http://dx.doi.org/10.3390/ma14133573
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