Abstract
Based on the complex dielectric susceptibility measurements, over the frequency range 10 kHz to 2 MHz and at different temperatures ranging from 25 0C to 80 0C, for a kerosenebased ferrofluid sample, the Claussius-Mossotti complex factor, K, was analyzed. Using the K obtained values and the Schwarz theoretical model, we have proposed an original method, very useful for determining the activation energy Ea of the Schwarz relaxation process from ferrofluid. The results show that the Ea decreases with the increase of temperature for all investigated frequencies. This behavior can be correlated with the deformation of the atmosphere of counterions from the surface of nanoparticles, which determines the polarization of ferrofluid in the low frequency field.
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