Remanent enhancement of nanocomposite (Nd, Sm)2Fe14B/α-Fe magnets

Improving permanent magnetic properties of rapidly solidified nanophase RE–TM–B alloys by compositional modification

“…Although some researchers reported an improved j H C with Sm substitution [6], our results indicate that Sm reduces j H C of Nd-FeCo-B alloy. As pointed out by Chen et al [7] and Zhang et al [8], the decrease in H c can be attributed to the decrease of the magnetocrystalline anisotropy of the material. On the other hand, despite the lower values of Sm 2 Fe 14 B than Nd 2 Fe 14 B, 10% Sm addition did not greatly reduce J r and, indeed, a very good squareness of 2nd quadrant J-H curves is obtained for Sm substituted alloy, which indicate excellent exchange coupling between hard and soft phase.…”