Al-doped Fe3O4 Nanoparticles and Their Magnetic Properties

作者：Wang Xue; Hu Chen Guo^*; Xi Yi; Xia Chuan Hui; He Xiao Shan

来源：Journal of Superconductivity and Novel Magnetism, 2010, 23(6): 909-911.

DOI：10.1007/s10948-009-0636-9

• Al-doped Fe3O4 Nanoparticles
• Synthesis
• Magnetic property

Al-doped Fe3O4 nanoparticles were synthesized for the first time via the Composite-Hydroxide-Mediated (CHM) method from Fe3O4 and Al2O3 without using any capping agent. The synthesis technique was one-step and cost effective. The obtained products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersion spectroscopy (EDS). Samples with a tunable size of 500-1500 nm, 200-800 nm, and 100-700 nm could be obtained by adjusting the reaction time and temperature. Magnetic property of the as-synthesized Al-doped Fe3O4 nanoparticles was investigated. Magnetic hysteresis loops measured in the field range of -10 kOe < H < 10 kOe, indicated the ferromagnetic behavior with coercivity (H (c)) of 470 and 110 Oe and remanence magnetization (M (r)) of 13 and 6.4 emu/g at the temperature of 5 and 300 K, respectively. The saturation intensity (M (s)) was 46.1 emu/g at 5 K, while it was about 43.6 emu/g at 300 K.

• 出版日期2010-8
• 单位重庆大学