Microemulsion-based synthesis of porous Co-Ni ferrite nanorods and their magnetic properties

► Magnetic properties of Co(1−x)NixFe2O4 nanorods can be changed by varying molar ratio of Co2+ to Ni2+ ions. ► Magnetic properties of Co-Ni ferrite nanorods are also controlled by calcination temperatures. ► Porous Co-Ni ferrite nanorods are synthesized by a microemulsion-based method in combination with calcination.