Monodisperse Co, Zn-Ferrite nanocrystals: Controlled synthesis, characterization and magnetic properties

► Reverse microemulsion route is a very facile route for synthesis of CoxZnyFe3−x−yO4 ferrite and all particles synthesized by reverse microemulsion is in the range of 3-6 nm. ► Presence of Zn changes the structural and magnetic properties of the Zn substituted CoFe2O4. ► The lattice constant increases with the increase in Zn substitution. ► The curie temperature decreases with Zn concentration appreciably. ► Magnetic behavior varies from ferromagnetic at y=0, 0.2 to superparamagnetic to paramagnetic at y=1.