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Sensors 2019, 19(8), 1761; https://doi.org/10.3390/s19081761

Magnetoimpedance in Symmetric and Non-Symmetric Nanostructured Multilayers: A Theoretical Study

1
Scientific and Research Institute of Natural Gases and Gas Technologies—Gazprom VNIIGAZ, Razvilka, Leninsky District, Moscow Region 142717, Russia
2
Department of Magnetism and Magnetic Nanomaterials, Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg 620002, Russia
3
Department of Electricity and Electronics, Basque Country University UPV/EHU, 48940 Leioa, Spain
*
Author to whom correspondence should be addressed.
Received: 14 March 2019 / Revised: 29 March 2019 / Accepted: 9 April 2019 / Published: 12 April 2019
(This article belongs to the Special Issue Biosensors with Magnetic Nanocomponents)
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Abstract

Intensive studies of the magnetoimpedance (MI) effect in nanostructured multilayers provide a good phenomenological basis and theoretical description for the symmetric case when top and bottom layers of ferromagnet/conductor/ferromagnet structure have the same thickness and consist of one magnetic layer each. At the same time, there is no model to describe the MI response in multilayered films. Here, we propose the corresponding model and analyze the influence of the multilayer parameters on the field and frequency dependences of the MI. The approach is based on the calculation of the field distribution within the multilayer by means of a solution of lineralizied Maxwell equations together with the Landau–Lifshitz equation for the magnetization motion. The theoretical model developed allows one to explain qualitatively the main features of the MI effect in multilayers and could be useful for optimization of the film parameters. It might also be useful as a model case for the development of MI magnetic biosensors for magnetic biomarker detection. View Full-Text
Keywords: magnetic multilayers; magnetoimpedance; modeling; magnetic sensors; magnetic biosensors magnetic multilayers; magnetoimpedance; modeling; magnetic sensors; magnetic biosensors
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Buznikov, N.A.; Kurlyandskaya, G.V. Magnetoimpedance in Symmetric and Non-Symmetric Nanostructured Multilayers: A Theoretical Study. Sensors 2019, 19, 1761.

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