NiFe2O4/graphene nanocomposites with tunable magnetic properties

Abstract

Novel NiFe2O4/graphene nanocomposites were synthesized via facile,one-pot solvothermal route,and the effects of processing conditions and composition on their magnetic properties have been studied.The nanocomposites consisted of monolayer graphene sheets decorated with uniformly dispersed NiFe2O4 nanoparticles of 6 nm in diameter. Increases in solvothermal temperature and time gave rise to improved crystallinity of NiFe2O4 nanoparticles and thus enhanced magnetic properties,while a high NiFe2O4 content resulted in a similar ameliorating effect on saturation agnetization,demonstrating tailored functional properties.A magnetic interaction between NiFe2O4/grahene was observed.