Title :
Microwave absorption studies in ferrofluid composites
Author :
Davies, P. ; Popplewell, J. ; Llewellyn, J.P.
Author_Institution :
University College of North Wales, Bangor, UK
fDate :
9/1/1986 12:00:00 AM
Abstract :
Magnetic field induced absorptions in ferrofluid composites containing aluminium particles have been studied in the microwave region (wavelength range 0.3 mm to 3 mm) using Fourier Transform Spectroscopy. The composites studied were in the form of thin films (≃ 30 µm thick) containing monolayers of aluminium particles dispersed in a decalin carrier ferrofluid of saturation magnetisation 500 G. Induced absorptions, as large as 60%, were observed in fields of 50 Oe in a composite containing 20% by volume of aluminium particles.
Keywords :
Electromagnetic propagation in absorbing media; Magnetic liquids; Microwave propagation; Aluminum; Choppers; Collimators; Control systems; Electromagnetic wave absorption; Lenses; Magnetic fields; Micromotors; Motor drives; Polarization;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1986.1064449