RELATION OF REMANENCE AND COERCIVITY OF ND,(DY)-FE,(CO)-B SINTERED PERMANENT-MAGNETS TO CRYSTALLITE ORIENTATION

For sintered permanent magnets based on Nd2Fe14B having magnetically o riented crystallites, a simple method of measuring the degree of align ment by x-ray diffraction is described, using the inverse pole figure technique. The results are related to a distribution function for the easy axis which is a direct measure of remanence. The fraction of the ideal [001] texture component in both Nd-Fe-B and Nd,Dy-Fe,Co-B magnet s is enhanced by doping with oxygen, resulting in a measurable increas e in remanence and improved loop squareness. The observed increase of the intrinsic coercivity H-i(c) with better crystallite orientation is also discussed.