Fig. 1 XRD patterns of non-aligned and aligned SmCo5/Co x powders with x = 0 and 15 wt%

Fig. 2 SEM images of SmCo5/Co x composite particles with cobalt adding amounts of: a x = 0; b x = 3; c x = 5; d x = 10; e x = 15 wt%. The right column shows enlarged images for typical areas in the corresponding left panels

Fig. 3 Size of Co particles as a function of Co adding amount

Fig. 4 Demagnetization curves of aligned SmCo5/Co x (x = 0, 3, 5, 10, and 15 wt%) powders. The curves were measured parallel to the aligned magnetic field

Fig. 5 Maximum magnetic energy product (BH)max, magnetization M 2T at the magnetic field of 2T, remanence M r, and intrinsic coercivity H ci of the SmCo5/Co composites as a function of Co adding amount. The inset in d shows the changes of intrinsic coercivity as a function of the size of coated Co particles

Fig. 6 dM/dH curves for aligned SmCo5/Co x powders with x = 0, 10, and 15 wt%. The curves were obtained by taking first-order derivative of the demagnetization curves measured parallel to the aligning direction