In this paper, after illustrating the current state of the art, we present our own technology in manufacturing super-paramagnetic nanoparticles (SPAN). The method is based on chemical coprecipitation by using single ion precursors, like chloride or/and nitrate salts. Apart from synthetic route description, a demonstration ofthe methods used for structural analysis and electric-magnetic properties determination is done followed by the comments and remarks on the recorded results. Finally, the role of doping in magnetic and optical properties of the prepared nanomagnetic materials is illustrated and the potential utilization of these materials in various technological applications is presented.