Synthesis and Characterization of Multiferroic NiFe_2O_4/BiFeO_3 Nanocomposites by Modified Pechini Method

摘要

Spinel-perovskite multiferroics of NiFe_2O_4/BiFeO_3 nanoparticles were prepared by modified Pechini method. The structure and morphology of the composites were examined by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that the composites consisted of spinel NiFe_2O_4 and perovskite BiFeO_3 after annealed at 700 °C for 2h, and the particle size ranges from 40 to 100nm. VSM and ME results indicated that the nanocomposites exhibited both tuning magnetic properties and a ME effect. The ME effect of the nanocomposites strongly depended on the magnetic bias and magnetic field frequency.