Magnetic properties of Fe/Co particles encapsulated in carbon nanotubes

ABSTRACT Fe/Co particles encapsulated in carbon nanotubes (CNTs) were prepared by anodic arc discharging plasma. Transmis-sion election microscopy (TEM), Raman spectroscopy, X-ray diffraction (XRD), and vibrating sample magnetometer (VSM) were used to character the structure and magnetic properties of the products. TEM results show that CNTs have little impurity and uniform size, and the particles encapsulated in carbon nanotubes are Fe/Co particles with good continuity. The magnetic properties of CNTs encapsulated with Fe/Co particles are greatly improved, and the saturated magnetization σ_s, remanence σ_r, and coercivity H_c of the sample are 17.30A·m²·kg^-1, 3.96A·m²·kg^-1, and 31521.60A·m^-1, respectively.