Superparamagnetic Behavior at Room Temperature Through Crystal Chemistry Modification and Particles-Assemblies Formation: Zinc And Nickel Ferrites Systems

Zinc and nickel ferrites were prepared both as single nanoparticles and particles forming assemblies through the solvothermal method. By means of Raman spectroscopy, the cation distribution in the spinel structure has been evaluated for all the samples in order to understand the magnetic behavior characterization. The influence of the assembly microstructure-type into the superparamagnetic behavior has been fully studied and it seems to drastically increase the magnetic response of the samples through a mechanism of favored dipolar interactions.