Synthesis and magnetic properties of spinel NiFe2O4 nanoparticles by oxidation roasting technique

Abstract

An oxidization roasting technique has been reported to be an effective route to synthetize nickel ferrite (NiFe₂O₄) with an inverse spinel crystal structure. In the present work, the interfacial reaction behavior and formation mechanism were clarified during the synthesis of nickel ferrite NiFe₂O₄. The nickel ferrite (NiFe₂O₄) with a saturation magnetization (Ms) of 37.96 emu/g was successfully synthesized. The synthesized NiFe₂O₄ particles had a pore volume of 0.001 cm³/g, a total pore volume of 0.004 cm³/g, a specific surface area (SSA) of 1.28 cm²/g nm, and an average pore size (SPA) of 1.28 nm. The nickel ferrite NiFe₂O₄ was classified as having a reverse spinel crystal structure in which the mixed spinel nickel ferrites were transformed into an inverse spinel structure. Furthermore, the nickel ferrite (NiFe₂O₄) could be successfully synthesized via oxidization roasting technique, which could be extended to fabricate other spinel ferrite particles of interest.