MAGNETIC-PROPERTIES AND MICROSTRUCTURE OF LIGHT RARE-EARTH SUBSTITUTED 2-17 MAGNETS

Partial substitution of light rare earths (LRE) for Sm in 2:17 magnets improves the remanence, maximum energy product and the loop squareness without affecting their Curie temperature and the temperature dependence of 4-pi-M(s). Uniform, single-phased microstructures were obtained for LRE substituted magnets after heat treatment. Heat treated metallographic specimens revealed striations on the etched surfaces parallel within each grain and perpendicular to the c axis of the magnet alloy.