Broadband dielectric and conductivity spectra of dielectric &amp;#x2014; Metal nanocomposites for microwave applications

Borisova, A.; Machulyansky, A.; Yakymenko, Yuriy; Bovtun, V.; Kempa, M.; Savinov, M.

doi:10.1109/elnano.2013.6551992

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…Some deviations of dielectric parameters from the monotonic dependence on concentration observed in [5] could be caused by nonuniform distribution of ferromagnetic nanoparticles in a dielectric matrix. Let us note, that magnetic properties of the composites are less dependent on the filler distribution and are mainly determined by the filler concentration.…”

Section: Resultsmentioning

confidence: 92%

“…High dielectric and magnetic losses of the epoxy resin -Fe composites observed in the high-frequency and microwave ranges (see Fig. 1 and [5]) are very important for their tentative application as absorbing or shielding materials.…”

Section: Resultsmentioning

confidence: 99%

“…Experimentally measured spectra of the real μ‫׳‬ and imaginary μ ‫״‬ parts of the complex magnetic permeability of the epoxy resin -Fe composites are presented in Figure 1, and the broadband spectra of the dielectric permittivity and conductivity are shown in [5].…”

Section: Resultsmentioning

confidence: 99%

“…Continuing previously performed experiments [4][5][6], the current work reports on the study of dielectric (10 -2 to 10 10 Hz) and magnetic (10 6 to 10 10 Hz) spectra of the epoxy resin -Fe composites and on the analysis of their microwave absorbing and shielding efficiency.…”

Section: Introductionmentioning

confidence: 98%

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Modeling of metal-dielectric nanocomposite coatings with ferromagnetic inclusions for electromagnetic protection of electronic devices

Borisova

Machulyansky

Yakymenko

et al. 2014

2014 IEEE 34th International Scientific Conference on Electronics and Nanotechnology (ELNANO)

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Metal-dielectric nanocomposite system with ferromagnetic inclusions was prepared and studied: epoxy resinxFe (x = 0-30 vol.% is a content of the Fe nanoparticles). Its dielectric and magnetic spectra were measured in a broad frequency range from 10 6 Hz to 10 10 Hz. Both dielectric and magnetic dispersion was observed. Based on the experimental spectra of the complex permittivity and permeability, reflection and transmission coefficients of of the composite layers in a free space were calculated depending on the content of ferromagnetic inclusions and layer thickness. Microwave absorption of the studied metal-dielectric composites varies in a broad rage and can be controlled by changing the concentration of ferromagnetic inclusions. The composites can be used as microwave absorbing or shielding materials.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Modeling of metal-dielectric nanocomposite coatings with ferromagnetic inclusions for electromagnetic protection of electronic devices

Borisova

Machulyansky

Yakymenko

et al. 2014

2014 IEEE 34th International Scientific Conference on Electronics and Nanotechnology (ELNANO)

Self Cite

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“…The phenomenon of percolation has been used in the description of various issues, such as the spread of epidemics [17][18][19], the reliability of computer networks [20] and the spread of fires [21,22], as well as in molecular biology [23], materials engineering [24,25] or the flow of electric current through conductive and non-conductive mixtures [26,27]. In recent decades, the percolation phenomenon has been successfully used to describe current conduction in metal-dielectric nanocomposites [28][29][30]. This is hopping conductivity based on the quantum mechanical phenomenon of electron tunneling [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Uneven Distribution of Nodes Creating a Percolation Channel in Matrices with Translational Symmetry for Direct Current

Zukowski,

Okal,

Kierczynski

et al. 2023

Energies

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In this study, the phenomenon of node percolation was tested using the Monte Carlo computer simulation method for square matrices with dimensions L = 55, 101 and 151. The number of samples for each matrix was 5 × 106. The spatial distributions of the coordinates of the nodes creating the percolation channel were determined, and maps of the density distribution of these nodes were created. It has been established that in matrices with finite dimensions, an edge phenomenon occurs, consisting of a decrease in the concentration of nodes creating a percolation channel as one approaches the edge of the matrix. As the matrix dimensions increase, the intensity of this phenomenon decreases. This expands the area in which values close to the maximum occur. The length distributions of the left and right clusters of non-conducting nodes were determined for the situation when the next randomly selected node connects them and thus reaches the percolation threshold. It was found that clusters whose dimensions are close to half of the matrix dimensions are most likely to occur. The research shows that both the values of the standard deviation of the percolation threshold and the intensity of the edge phenomenon are clearly related to the dimensions of the matrices and decrease as they increase.

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Conductivity of metal (Al, Cu)-dielectric composites and modeling of the single- and multi-layer composite coatings for microwave applications

Borisova

Bondar

Machulyansky

et al. 2014

2014 IEEE 34th International Scientific Conference on Electronics and Nanotechnology (ELNANO)

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Broadband dielectric and conductivity spectra of dielectric — Metal nanocomposites for microwave applications

Cited by 5 publications

References 4 publications

Modeling of metal-dielectric nanocomposite coatings with ferromagnetic inclusions for electromagnetic protection of electronic devices

Modeling of metal-dielectric nanocomposite coatings with ferromagnetic inclusions for electromagnetic protection of electronic devices

Analysis of Uneven Distribution of Nodes Creating a Percolation Channel in Matrices with Translational Symmetry for Direct Current

Conductivity of metal (Al, Cu)-dielectric composites and modeling of the single- and multi-layer composite coatings for microwave applications

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