Fabrication and characterization of spherical Co/Ni alloy particles

摘要

Spherical ferromagnetic Co/Ni alloy particles have been synthesized via a polyol process assisted by solvothermal treatment. XRD, EDX and SEM analyses have shown that the equal molar Ni(CH_3COO)_2 centre dot 4H_2O and Co(CH_3COO)_2 centre dot 4H_2O were reduced by ethylene glycol at 200 deg C, resulting in the formation of Co_(50)Ni_(50) alloy particles with a narrow particle size ranging from 200 nm to 500 nm. Magnetic properties of the sample at room temperature were measured using a vibrating sample magnetometer. The saturation magnetization and coercivity of the Co/Ni particles exhibit 123.21 emu/g and 108.23 Oe, respectively, which indicates that the alloy is ferromagnetic at room temperature.