Thermal Dependence of Ferrofluids Dielectric Response

This paper deals with dielectric spectroscopy in the frequency domain, where polarization events in ferrofluid samples with concentrations of 0.25% and 0.5% vol. were monitored. The samples were compared with a carrier fluid, in this case transformer mineral oil ITO 100. Polarization phenomena were observed in different frequency ranges, which are related to the presence of Fe3O4 nanoparticles in the ferrofluid. For a better interpretation of the results, temperature dependence was used to help in defining the polarization events and their mechanisms in composite materials such as ferrofluids.