Prepare highly crystalline NiFe2O4 nanoparticles with improved magnetic properties

作者：Wang J^*

来源：Materials Science and Engineering B-Solid State Materials for Advanced Technology, 2006, 127(1): 81-84.

DOI：10.1016/j.mseb.2005.09.003

• magnetic material
• chemical synthesis
• X-ray diffraction

Hydrothermal process was successfully used to synthesize NiFe2O4 powder using ferric chloride (FeCl3) and nickel chloride (NiCl2.4H(2)O) as starting materials by carefully controlling the reaction conditions. The as-prepared NiFe2O4 sample was characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), Mossbauer spectra and its magnetic properties were evaluated on a vibrating sample magnetometer (VSM). The nanoscale (25 nm) NiFe2O4 powder obtained at 140 degrees C for 12 h possessed a saturation magnetization of 53.6 emu/g, close to that of the correspondent bulk materials. It is suggested that the well-crystallized NiFe2O4 particles formed under appropriate hydrothermal conditions should be responsible for the increased saturation magnetization in nanosized NiFe2O4.

• 出版日期2006-2-15
• 单位宁波大学