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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Bibliographic Details
Published in:Technical physics 2019-06, Vol.64 (6), p.893-896
Main Authors: Gareev, K. G., Luchinin, V. V., Sevost’yanov, E. N., Testov, I. O., Testov, O. A.
Format: Article
Language:English
Subjects:
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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Summary: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