Frequency Dependence of an Electromagnetic Absorption Coefficient in Magnetic Fluid

The samples of water-based magnetic fluid, which contain Fe 3 O 4 –SiO 2 particles with a spherical shape and sizes less than 100 nm, have been obtained. The method based on using a transmission line has been applied to measure the electromagnetic absorption coefficient in the frequency range from 0...

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Veröffentlicht in:	Technical physics 2019-06, Vol.64 (6), p.893-896
Hauptverfasser:	Gareev, K. G., Luchinin, V. V., Sevost’yanov, E. N., Testov, I. O., Testov, O. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	ABSORPTION Absorptivity ANTENNAS Antennas (Electronics) Classical and Continuum Physics CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Dependence Electric waves Electromagnetic absorption ELECTROMAGNETIC RADIATION Electromagnetic waves Electromagnetism FLUIDS Frequency ranges GHZ RANGE Horn antennas HYPERTHERMIA IRON OXIDES Magnetic fluids MAGNETIC MATERIALS PARTICLES Physics Physics and Astronomy Power lines POWER TRANSMISSION LINES Radiophysics Silicon dioxide SILICON OXIDES SPHERICAL CONFIGURATION Transmission lines WATER
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Zusammenfassung:	The samples of water-based magnetic fluid, which contain Fe 3 O 4 –SiO 2 particles with a spherical shape and sizes less than 100 nm, have been obtained. The method based on using a transmission line has been applied to measure the electromagnetic absorption coefficient in the frequency range from 0.1 to 18.0 GHz using a measuring setup based on horn antennas and the cell based on a coplanar transmission line. It has been found that magnetic fluids can be used to produce electromagnetic shields and electromagnetic wave absorbers as well as means to carry out local hyperthermia at electromagnetic radiation frequencies higher than 7 GHz.
ISSN:	1063-7842 1090-6525
DOI:	10.1134/S1063784219060069