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Mg-doped Ni nanoparticles with good soft magnetic properties were prepared with the sol-gel method and were sintered at 400, 500, 600, and 900 °C in argon atmosphere, respectively. The structure and magnetic properties of the samples were studied by means of X-ray diffraction, TEM, and VSM magnetometers. X-Ray powder diffraction results show that Ni-Mg solid solution was formed with the single phase of face-centered cubic(fcc) structure. The particle size became larger with the increase of temperature. When the sintering temperature was 400 °C, the particle size was 6.3 nm, whereas it was 46.2 nm at 900 °C. Both the saturation magnetization(Ms) and the coercivity were enhanced with the increase of the particle size. The Ms values of the samples ranged from 18.965 to 46.766 emu/g and the coercivity ranged from 1051.3568 to 9145.0848 A/m.
Mg-doped Ni nanoparticles with good soft magnetic properties were prepared with the sol-gel method and were sintered at 400, 500, 600, and 900 ° C in argon atmosphere, respectively. The structure and magnetic properties of the samples were studied by means X-ray powder diffraction results show that Ni-Mg solid solution was formed with the single phase of face-centered cubic (fcc) structure. The particle size became larger with the increase of temperature. When the sintering temperature was 400 ° C, the particle size was 6.3 nm, and it was 46.2 nm at 900 ° C. Both the saturation magnetization (Ms) and the coercivity were enhanced with the increase of the particle size. The Ms values of the samples ranged from 18.965 to 46.766 emu / g and the coercivity ranged from 1051.3568 to 9145.0848 A / m.