Abstract
Field and frequency-dependent, complex susceptibility, χ( ω, H)= χ′( ω, H)-i χ′′( H, ω), measurements, obtained by means of the toroidal technique, over the range 10 Hz–1 MHz, are used to investigate the non-linear relaxational properties of a water-based magnetic fluid. The results obtained are discussed in terms of the magnetic analogue of the Coffey and Paranjape model as modified by Déjardin.
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