Synthesis and characterization of Co and Ni magnetic nanoparticles

This paper reports some results on the synthesis and magnetic properties of cobalt and nickel nanoparticles. Cobalt and nickel nanoparticles have been synthesised by polyol method and the obtained magnetic nanoparticles have a superparamagnetic behaviour. The morphology and size of the nanoparticles were studied by scanning electron microscopy (SEM) and dynamic light scattering (DLS). The micrographs reveal that the nanoparticles are mostly spherical. The size of Co nanoparticles ranges between 30 - 340 nm and size of Ni nanoparticles ranges between 90 - 400 nm. Magnetic characteristics of the obtained nanoparticles were determined at room temperature by using a vibrating sample magnetometer (VSM), in an external magnetic field of 600 kA/m.