Magnetic and absorbing properties of M-type substituted hexaferrites BaFe12–x Ga x O19 (0.1 &lt; x &lt; 1.2)

Труханов, С. В.; Труханов, А.В.; Костишин, В. Г.; Panina, L.V.; Kazakevich, I. S.; Турченко, В. А.; Oleinik, V. V.; Yakovenko, O. S.; Matsuı̆, L. Yu.

doi:10.1134/s1063776116090089

Cited by 102 publications

(24 citation statements)

References 23 publications

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“…Ferrite nanoparticles with the Li 0.15 (Ni 0.5 Zn 0.5 ) 0.7 Fe 2.15 O 4 (LNCFO) composition were prepared by the chemical co-precipitation method. This specific method for the preparation and characterization of all the samples with the magnetic properties had been previously published [46][47][48][49]. The obtained ferrite powder consisted of particles with an average size in the range from 31 nm to 88 nm.…”

Section: Preparation Of Nickel-zinc Lithium Ferrite Nanoparticles Andmentioning

confidence: 99%

Investigation of AC-Measurements of Epoxy/Ferrite Composites

et al. 2020

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A pure ferrite and epoxy samples as well as the epoxy/ferrite composites with different 20 wt.%, 30 wt.%, 40 wt.%, and 50 wt.% weight ferrite contents have been prepared by the chemical co-precipitation method. AC-conductivity and dielectric properties such as the dielectric constant and dielectric loss of the prepared samples have been studied. The obtained results showed that the samples had a semiconductor behavior. The dielectric constant of the composites has been calculated theoretically using several models. For the composite sample that contains 20 wt.% of ferrites, these models give satisfactory compliance, while for the composite samples with a higher percentage of nanofillers, more than 30 wt.% theoretical results do not coincide with experimental data. The investigated polymer has very low conductivity, so this type of polymer can be useful for high-frequency applications, which can reduce the losses caused by eddy current. Thus, the prepared samples are promising materials for practical use as elements of microwave devices.Nanomaterials 2020, 10, 492 2 of 16 Nanotechnology can be an excellent tool in the study, preparation, research, and use of new perspective materials, as well as in solving the problem of particles sizes in the range of 1-100 nm, where unusual phenomena allow new applications [2][3][4]. Tiny nanoparticles with diameters of some nanometers usually look like molecules. Therefore, the atomic and electronic structures of such small nanoparticles possess different features, certainly not the same as those of the bulk materials. The size-dependent abilities of nanoparticles include electronic, magnetic, optical, and chemical substance characteristics. Nanoparticles can be crystalline or amorphous [5].Nanosized ferrites could be prepared by many methods, including mechanized milling, ultrasonic cavitation method, radio rate of recurrence plasma, hydrothermal technique, reverse micelle method, sol-gel technique, citrate precursor, and co-precipitation technique [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. It is advisable to possess a synthesis method that allows for governor on the nanoparticle dimension and produces nanoparticles having a significant size distribution [2]. The chemical substance co-precipitation method is the most excellent ideal for the formation of nanoparticles due to its ease and much-improved handle over the crystallite dimension and other qualities of the components [22]. Also, lately, magnetic composites comprising magnetic materials alongside polymers comprise a new era of multifunctional components that mix the properties from the constituents; these components are known as magneto-polymeric components [23].The characteristics of ferrites are highly susceptible to methodical handling, sintering conditions, and impurity. Nickel-zinc ferrite is one of the first widely used ferrite produced for an open range of applications that recognizes to high saturation magnetization, high resistance, high Curie temperature, high chemical stability, low coerciv...

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Section: Preparation Of Nickel-zinc Lithium Ferrite Nanoparticles Andmentioning

confidence: 99%

Investigation of AC-Measurements of Epoxy/Ferrite Composites

et al. 2020

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“…The anisotropy field H a and anisotropy constant K 1 of 30 wt.% Ba(Fe 1−x Ga x ) 12 O 19 /epoxy composites (0 ≤ x ≤ 0.1) were calculated using Equations 7and (8), and the results are presented in Figure 8. where MS is the saturation magnetization of the domains.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

“…One of the major tasks in creating modern mobile communication devices is the development of new materials which can work in a wide (up to 100 GHz) frequency range in switches, circulators, phase shifters, transceivers, antennas and effective electromagnetic radiation (EMR) absorbers, which improve the electromagnetic compatibilities of devices [1][2][3][4][5]. M-type hexagonal ferrites are one of the most prospective electromagnetic materials for application in the centimeter and millimeter wave range due to the large values of permeability and magnetization, and good dielectric properties at microwave frequencies [6][7][8][9][10]. These materials are magnetically hard with high coercivity and magnetic permeability, and are also characterized by high values of magnetocrystalline anisotropy along the c-axis of the hexagonal structure.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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The paper describes preparation features of functional composites based on ferrites, such as “Ba(Fe1−xGax)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(Fe1−xGax)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(Fe1−xGax)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.

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“…6 But they are inherently narrowband and exhibit increased payload due to their high density. 7 Further, gallium-doped hexaferrites and nano-composite based dielectric and magnetic materials can be used to enhance absorption performance. 8,9 Metasurfaces are generally composed of an array of artificially engineered sub-wavelength scattering particles, i.e., meta-atoms with uniform or non-uniform arrangement.…”

Section: Introductionmentioning

confidence: 99%

Metasurfaces for Stealth Applications: A Comprehensive Review

Joy¹,

Dileep

Abhilash³

et al. 2021

J. Electron. Mater.

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Metasurfaces are ultrathin, two-dimensional structures composed of periodic or quasi-periodic arrays of sub-wavelength scatterers. They possess the unique ability to comprehensively control the phase, amplitude and polarization of incident electromagnetic waves with added advantages such as ease of fabrication and less space consumption. On account of these factors, they are progressively replacing their three-dimensional counterparts, i.e. metamaterials in a wide gamut of fields such as signal multiplexing, stealth technology, holographic imaging, planar optical devices, polarization transformation devices and so on. Further, metasurfaces offer a strong and promising platform for aerospace applications due to their diversified functionalities and reduced weight penalties. Moreover, it has been widely used for the realization of thin, broadband and polarization independent radar absorbing structures (RAS). In this regard, this paper presents a concise review on the recent advancements in the field of metasurfaces specifically for stealth applications. Special emphasis has been laid on diffusion and coding metasurfaces due to their attractive properties towards the realization of low observable platforms. Furthermore, various types of metasurfaces as well as the different techniques used for the optimization of metasurfaces are also described in detail.

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Magnetic and absorbing properties of M-type substituted hexaferrites BaFe12–x Ga x O19 (0.1 < x < 1.2)

Cited by 102 publications

References 23 publications

Investigation of AC-Measurements of Epoxy/Ferrite Composites

Investigation of AC-Measurements of Epoxy/Ferrite Composites

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

Metasurfaces for Stealth Applications: A Comprehensive Review

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