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Open AccessArticle

Functional Magnetic Composites Based on Hexaferrites: Correlation of the Composition, Magnetic and High-Frequency Properties

1
Physics Department, Taras Shevchenko National University of Kyiv, Volodymyrska Str. 64/13, 01601 Kyiv, Ukraine
2
Department of Technology of Electronics Materials, National University of Science and Technology “MISiS”, Leninskii av., Moscow 4119049, Russia
3
SSPA “Scientific and Practical Materials Research Centre of the NAS of Belarus”, P. Brovki Str. 19, 220072 Minsk, Belarus
4
Scientific and Educational Center "Nanotechnology", South Ural State University, Lenin av. 76, Chelyabinsk 454080, Russia
5
Department of Functional Electronics Materials, National Research University of Electronic Technology “MIET”, Zelenograd 124498, Russia
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(12), 1720; https://doi.org/10.3390/nano9121720
Received: 30 October 2019 / Revised: 18 November 2019 / Accepted: 26 November 2019 / Published: 2 December 2019
(This article belongs to the Special Issue Functional Nanomagnetics and Magneto-Optical Nanomaterials)
The paper describes preparation features of functional composites based on ferrites, such as “Ba(Fe1xGax)12O19/epoxy,” and the results of studying their systems; namely, the correlation between structure, magnetic properties and electromagnetic absorption characteristics. We demonstrated the strong mutual influence of the chemical compositions of magnetic fillers (Ba(Fe1xGax)12O19 0.01 < x < 0.1 solid solutions), and the main magnetic (coercivity, magnetization, anisotropy field and the first anisotropy constant) and microwave (resonant frequency and amplitude) characteristics of functional composites with 30 wt.% of hexaferrite. The paper presents a correlation between the chemical compositions of composites and amplitude–frequency characteristics. Increase of Ga-content from x = 0 to 0.1 in Ba(Fe1xGax)12O19/epoxy composites leads to increase of the resonant frequency from 51 to 54 GHz and absorption amplitude from −1.5 to −10.5 dB/mm. The ability to control the electromagnetic properties in these types of composites opens great prospects for their practical applications due to high absorption efficiency, and lower cost in comparison with pure ceramics oxides.
Keywords: magnetic composites; polymer-matrix composites (PMCs); magnetic properties; high-frequency properties magnetic composites; polymer-matrix composites (PMCs); magnetic properties; high-frequency properties
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MDPI and ACS Style

Matzui, L.Y.; Trukhanov, A.V.; Yakovenko, O.S.; Vovchenko, L.L.; Zagorodnii, V.V.; Oliynyk, V.V.; Borovoy, M.O.; Trukhanova, E.L.; Astapovich, K.A.; Karpinsky, D.V.; Trukhanov, S.V. Functional Magnetic Composites Based on Hexaferrites: Correlation of the Composition, Magnetic and High-Frequency Properties. Nanomaterials 2019, 9, 1720.

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