Crystal Structure and Magnetic Properties of Co-Mo Alloys Produced by Mechanical Alloying

We report the analysis of the crystal structure and the magnetic properties of CoSUB100-X/SUBMoSUBX/SUB alloys (0 x 100, Δx =10), obtained by mechanical alloying using a shaker mixer mill, at room temperature for 7 h. Crystal structure, morphology and magnetic properties of the Co-Mo system were characterized through XRD (X-ray diffraction), SEM (scanning electron microscopy) and VSM (vibrating sample magnetometry). The results showed different completely soluble solid solution, in almost all compositions. Williamson-Hall method revealed an increase in the crystallite size, decreased with the molybdenum content, from 27.34 nm to 8.02 nm for 0 to 100 wt.% of Mo, respectively. Saturation magnetization and the magnetocrystalline anisotropy, showed the same behavior, a diminution with the increase of the molybdenum content. However, the coercivity increased with the increment in Mo content, reaching a maximum of 63.79 kA/m for CoSUB20/SUBMoSUB80/SUB.