Solvothermal Synthesis and Magnetic Properties of Fe3O4 Microspheres

摘要

We synthesized Fe3O4 microspheres using a solvothermal method and characterized their morphologies,structures,surface property and magnetism by field emission scanning electron microscopy (FE-SEM),powder X-ray diffraction (XRD) patterns,Fourier transform infrared (FTIR) absorption spectra,and vibrating sample magnetometer (VSM).The results showed that the synthesized Fe3O4 microspheres with a tunable size range of ca.80-200 nm are composed of many Fe3O4 collective nanoparticles.XRD pattern confirmed that the Fe3O4 microspheres belong to cubic structure.Magnetic investigation reveals that the Fe3O4 microspheres have higher saturation magnetization and negligible coercivity at room temperature.