A three-dimentional finite element micromagnetic algorithm was developed to study the magnetization reversal of Pr2Fe14B single-phase nanocrystalline permanent magnets. A single-phase nanocrystalline Pr2Fe14B magnets composed of 216 irregular shaped grains was built. The magnetic hysteresis loops were simulated by micromagnetic finite element method. The contribution of intergrain exchange coupling ment degree （IGEC） to remanence enhancement is considered related to the alignin oriented magnets, and decreased with improved grain alignment. For the magnets with perfectly crystallo- graphic alignment of grains, the contribution of IGEC to remanence enhancement is nearly zero. The shape of demagnetization curve is not only dependent on grain alignment degree but also on the strength of IGEC in magnets.
Sm（CObalFeyCuxZrw）z ribbons have been prepared by melt spinning at a low wheel velocity followed by shorttime aging and slow cooling the as-spun ribbons from 850 to 400℃. It is found that the composition can significantly influence the degree of crystallographic texture of the ribbons. The 1：7 phase of the as-spun ribbons is segregated into 1：5 and 2：17 phases by the simple processing procedure ribbons after precipitation hardening. （BH）max about by the adjustment of composition. However, the crystallographic texture is still preserved in the 86kJ/m^3 can be obtained in the Sm（Co, Fe, Cu, Zr）z ribbons
