Characterisation of magnetic fluids
نویسنده
چکیده
One method suitable for the accurate characterisation of magnetic fluids is by the measurement of the frequency-dependent, complex susceptibility, χ(ω) = χ′(ω) − iχ′′(ω). Such measurements enable data on, relaxation mechanisms, ferromagnetic resonance, stochastic resonance, non-linear properties, magnetic losses and the signal-to-noise ratio (SNR) of these colloidal nano-particle systems to be readily and successfully determined. Here, a brief review is given of the above-mentioned topics and examples of results obtained, presented. © 2003 Elsevier B.V. All rights reserved.
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