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 remanence 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. (orig.)