The magnetization dynamics of magnetic nanoparticles are essential for the medical applications hyperthermia and particle imaging. In this paper, we clarified AC susceptibility superparamagnetic their frequency dependence. We measured under an applied DC bias field. dependence was clearly observed. experimentally obtained characteristics samples with different effective core diameters on intens...

The low-field (below 5 Oe) ac and dc magnetic response of a magnetic fluid [MF] sample in the range of 305 to 360 K and 410 to 455 K was experimentally and theoretically investigated. We found a systematic deviation of Curie's law, which predicts a linear temperature dependence of inverse initial susceptibility in the range of our investigation. This finding, as we hypothesized, is due to the o...