Time and temperature dependent magnetic viscosity experiments on Sr/Co nanoferrite particles

Magnetic viscosity experiments have been performed in order to investigate the magnetization reversal Sr nanoferrite particles (nanoscale SrFe12O19) and interacting Sr/Co (SrFe12O19–CoFe2O4 nanocomposites). The magnetic S = d M ( t ) / l n ), where is as a function of time, has collected. For shows maximum close coercive field, reflecting relation between energy barrier distribution. We evidence that on provide reliable qualitative results for different field sweep rate saturating H s considered. In addition, activation volumes extracted from at temperatures are quantitatively correlated anisotropy changes.