Abstract
The dynamic properties of two series of samples of γ-Fe 2O 3 nanoparticles (average diameter D =4.7 and 8.3 nm), dispersed in a polymer, were investigated by means of linear and non-linear AC susceptibility measurements over a large frequency range ( 5<ν<10 4 Hz ). The temperature and frequency dependence of both linear and non-linear susceptibilities was analysed for different degrees of dispersion of particles in the polymer, i.e. for different strengths of inter-particle interactions.
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