Complex Permittivity and Permeability of Composite Materials Based on Carbonyl Iron Powder Over an Ultrawide Frequency Band

Semenenko, V. N.; Chistyaev, V. A.; Politiko, A. A.; Kibets, S. G.; Kisel, V. N.; Gallagher, C. P.; McKeever, Conor; Hibbins, Alastair P.; Ogrin, F. Y.; Sambles, J. R.

doi:10.1103/physrevapplied.16.014062

Cited by 13 publications

(6 citation statements)

References 45 publications

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“…(3a, 3b). Table 2 shows that reported constitutive parameter values for iron powders result in lower attenuation constant values for iron powder compared to solid iron [26][27][28] . This results in larger skin depth values for iron powders compared to iron in bulk form.…”

Section: Discussionmentioning

confidence: 99%

Magnetic field coupling with lunar soil simulants

Garman

Roth

Roux

et al. 2023

Sci Rep

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Wireless power transfer (WPT) using magnetically coupled resonators is being integrated into space vehicles destined for the lunar surface. The dusty soil on the Moon, called lunar regolith, is known to adhere to surfaces and is also known to contain iron, including iron oxides and metallic iron. Regolith samples are limited, and lunar soil simulants are commonly used in space science research for efforts in surface vehicle navigation, in-situ resource utilization, and power infrastructure. However, most simulants contain no metallic iron, and research involving electromagnetic field interactions with regolith would benefit from incorporating metallic iron into test samples. This work presents experimental results from tests using WPT with magnetically coupled resonators in the presence of various standard lunar simulants, plus a new iron-enriched simulant and metallic iron powders. Results for power transfer efficiency, thermal response, and frequency response are presented and demonstrate that the presence of metallic iron and its particle size are critical factors affecting the coupling of the incident magnetic field with lunar simulants and iron powder samples. The importance of particle size-to-skin depth ratio is discussed. Attenuation constants for various iron powders are estimated from experimental data and compared to those of lunar regolith and simulants.

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Section: Discussionmentioning

confidence: 99%

Magnetic field coupling with lunar soil simulants

Garman

Roth

Roux

et al. 2023

Sci Rep

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“…Naturally, people would wonder whether the proposed 'Uncertainty Principle' for the μ( f ) spectra can be observed in experiments. Here, a typical example is given for the μ( f ) spectra of EM composites containing carbonyl iron (Fe) particles which were reported by many research groups around the world [28][29][30][31][32][33][34][35][36]. Clearly, their μ( f ) spectra are significantly different within the same frequency range for samples with similar volume fractions.…”

Section: Effect Of the Remanent States (Memory Effect)mentioning

confidence: 94%

Intrinsic high frequency permeability of magnetic nanocomposites: uncertainty principle

Han

2024

Nanotechnology

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The intrinsic high frequency permeability spectra of ferromagnetic conductive nanocomposites containing different volume fractions of nanoscale iron and cobalt have been simulated. A law is proposed to explain the simulated results by assuming that there are plenty of LLG (Landau-Lifshitz-Gilbert) type natural resonances contributing to the intrinsic permeability spectra. The results clearly show that the spectra strongly depend on the distribution of local effective magnetic field, the interaction between the magnetic particles, the inhomogeneous damping constant of LLG precession, and the initial equilibrium states. Especially, the effect of particles shape distribution in each sampling on the local effective magnetic field. In view of this fact: it is absolutely impossible to have the same effect from these factors when someone prepares several measurement samples, an uncertainty principle is believed to hold for measuring the intrinsic permeability of an electromagnetic (EM) composite. Therefore, this law tells us that it should be cautious when comparing or evaluating the EM properties of composites (for instance, EM wave absorbing composites). Memory effect can be used to restore the intrinsic high frequency permeability for a specific defunct composite sample.

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“…Concurrently, composite filled with Fe 20% powder demonstrated a narrower peak with a single loss maximum. Both powders produced composites with low magnetic loss below 0.5 GHz, which is unusual for spherical iron (see carbonyl iron studies, [1,45]). This makes the samples promising materials for application in many areas, one being antennas.…”

Section: Microwave Measurement Of Compositesmentioning

confidence: 96%

The Size Dependence of Microwave Permeability of Hollow Iron Particles

Artemova

Maklakov

Osipov

et al. 2022

Sensors

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Hollow ferromagnetic powders of iron were obtained by means of ultrasonic spray pyrolysis. A variation in the conditions of the synthesis allows for the adjustment of the mean size of the hollow iron particles. Iron powders were obtained by this technique, starting from the aqueous solution of iron nitrate of two different concentrations: 10 and 20 wt.%. This was followed by a reduction in hydrogen. An increase in the concentration of the solution increased the mean particle size from 0.6 to 1.0 microns and widened particle size distribution, but still produced hollow particles. Larger particles appeared problematic for the reduction, although admixture of iron oxides did not decrease the microwave permeability of the material. The paraffin wax-based composites filled with obtained powders demonstrated broadband magnetic loss with a complex structure for lesser particles, and single-peak absorption for particles of 1 micron. Potential applications are 5G technology, electromagnetic compatibility designs, and magnetic field sensing.

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Complex Permittivity and Permeability of Composite Materials Based on Carbonyl Iron Powder Over an Ultrawide Frequency Band

Abstract: The version presented here may differ from the published version. If citing, you are advised to consult the published version for pagination, volume/issue and date of publication

Cited by 13 publications

References 45 publications

Magnetic field coupling with lunar soil simulants

Magnetic field coupling with lunar soil simulants

Intrinsic high frequency permeability of magnetic nanocomposites: uncertainty principle

The Size Dependence of Microwave Permeability of Hollow Iron Particles

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