PURPOSE: To improve coercive force and maximum energy product by blending specific amounts of elements each selected from the group consisting of B, C, N, Si, and P and the group consisting of Li, Na, K, Rb, and Cs with rare earth element-Fe-Co.
CONSTITUTION: A permanent magnet material has a composition satisfying a composition formula R1-x-y-z-αFexCoyXzMα: where R is a combination of 1 or ≤2 kinds among rare earth elements including Y; X means one or more elements among B, C, N, Si, and P; M means one or more elements among Li, Na, K, Rb, and Cs; and, as to the symbols 'x', 'y', 'z', and 'α', 0.50≤x≤0.85, 0≤y≤0.20, 0.01≤z≤0.15, and 0.015≤α≤0.05. Owing to the above composition, magnetic properties such as coercive force, maximum energy product, etc., are improved and permanent magnets can be made highly efficient.
SUZUKI HIDEETSU
NISHIDA MITSUYOSHI
YOSHIDA NOBUMASA
