Effect of Surfactants on Structural and Dielectric Properties of Cobalt Ferrite

Abstract

Cobalt ferrite (Cofe2o4) particles were synthesized with and without presence of surfactants using a co-precipitation method. Three surfactants Cetyl Tri methyl Ammonium Bromide (CTAB-cationic), Sodium dodecylbenzenesulphonate (anionic), Triton X-100 (nonionic), were used and investigate their effects on the structural and dielectric properties of CoFe2O4 particles. The ferrite precursors were first pre calcined in a muffle furnace at 500°C and then calcined at 950°C. Structural, dielectric and magnetic properties of prepared particles were investigated using X-ray powder diffraction, Dielectric and Low field ac magnetic susceptibility measurement. Phase purity of prepared samples was confirmed by X-ray diffraction. The sample with surfactant Triton X-100 shows the highest values of dielectric constant at low frequency.

Hybrid magnetic–plasmonic nanocomposite: embedding cobalt clusters in gold nanorods

“…CTAB), which reduce the magnetic behaviour of the obtained nanohybrids. 84,85 The capping agent have a fetal inuence to reduce its magnetic properties, even in presence of magnetic dopant (i.e. cobalt clusters).…”