Microstructure and magnetic properties of melt-spun magnetically anisotropic Sm1+δCo5 ribbons

The structural and magnetic properties of melt-spun Sm1+δCo5 ribbons (δ=0, 0.05, 0.1, 0.15 and 0.2) prepared using low wheel speed (v=5 m s-1) have been studied by X-ray diffraction and magnetic measurement. A high degree of texture, in which the c-axis is parallel to the longitudinal direction of the ribbons, has been observed for the first time. Thermal stability of coercivity can be improved by the addition of Sm. For δ=0.15, the coercivity is above 20 kOe at RT and up to 4.4 kOe at 300°C. The remanance Mr is found to depend sensitively on the angle between the applied fields and the longitudinal direction of ribbon, and a maximum energy product of about 18.2 MGOe has been achieved for δ=0.1 ribbons.