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Mechanism of Topology Change of Flat Magnetic Structures

The paper investigates the processes of the magnetization reversal of perforated ferromagnetic films with strong anisotropy of the easy-plane type. The investigations have shown that, influenced by a current impulse passing through an antidot, an inhomogeneous magnetic structure is formed, which is...

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Detalles Bibliográficos
Autores principales: Magadeev, Eugene, Vakhitov, Robert, Sharafullin, Ildus
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9407601/
https://www.ncbi.nlm.nih.gov/pubmed/36010768
http://dx.doi.org/10.3390/e24081104
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author Magadeev, Eugene
Vakhitov, Robert
Sharafullin, Ildus
author_facet Magadeev, Eugene
Vakhitov, Robert
Sharafullin, Ildus
author_sort Magadeev, Eugene
collection PubMed
description The paper investigates the processes of the magnetization reversal of perforated ferromagnetic films with strong anisotropy of the easy-plane type. The investigations have shown that, influenced by a current impulse passing through an antidot, an inhomogeneous magnetic structure is formed, which is accompanied by the localization of a quasiparticle with the +1 topological charge on the antidot and by an emission of a quasiparticle with a –1 charge. It is established that this scenario of the film magnetization reversal underlies a reformation of its inhomogeneous structure also if two or four antidots are present in the film, irrespective of the fact of through which antidots and in which directions the currents are passed. The results of the research obtained by using two independent methods (solving the Landau–Lifshitz–Gilbert equations and analyzing the lattice model) demonstrated good agreement between the two. It is shown that a magnetic film comprising two or four antidots can be used as a memory cell for recording data in the ternary system.
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spelling pubmed-94076012022-08-26 Mechanism of Topology Change of Flat Magnetic Structures Magadeev, Eugene Vakhitov, Robert Sharafullin, Ildus Entropy (Basel) Article The paper investigates the processes of the magnetization reversal of perforated ferromagnetic films with strong anisotropy of the easy-plane type. The investigations have shown that, influenced by a current impulse passing through an antidot, an inhomogeneous magnetic structure is formed, which is accompanied by the localization of a quasiparticle with the +1 topological charge on the antidot and by an emission of a quasiparticle with a –1 charge. It is established that this scenario of the film magnetization reversal underlies a reformation of its inhomogeneous structure also if two or four antidots are present in the film, irrespective of the fact of through which antidots and in which directions the currents are passed. The results of the research obtained by using two independent methods (solving the Landau–Lifshitz–Gilbert equations and analyzing the lattice model) demonstrated good agreement between the two. It is shown that a magnetic film comprising two or four antidots can be used as a memory cell for recording data in the ternary system. MDPI 2022-08-11 /pmc/articles/PMC9407601/ /pubmed/36010768 http://dx.doi.org/10.3390/e24081104 Text en © 2022 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
Magadeev, Eugene
Vakhitov, Robert
Sharafullin, Ildus
Mechanism of Topology Change of Flat Magnetic Structures
title Mechanism of Topology Change of Flat Magnetic Structures
title_full Mechanism of Topology Change of Flat Magnetic Structures
title_fullStr Mechanism of Topology Change of Flat Magnetic Structures
title_full_unstemmed Mechanism of Topology Change of Flat Magnetic Structures
title_short Mechanism of Topology Change of Flat Magnetic Structures
title_sort mechanism of topology change of flat magnetic structures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9407601/
https://www.ncbi.nlm.nih.gov/pubmed/36010768
http://dx.doi.org/10.3390/e24081104
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