Patent ID: 7022252

Claim:
A permanent magnetic alloy comprising an R—Fe—B alloy wherein R is at least one element selected from rare earth elements including Y, the R—Fe—B alloy having a composition mainly comprising Fe, containing N in an amount of more than 0.0001 at. % but 0.01 at. % or less and containing 4 at. % or more of B; the R—Fe—B alloy substantially comprising a TbCu 7 hard magnetic phase (main phase) and a fine crystal having an average crystal grain size of less than 5 nm and/or an amorphous phase; and the R—Fe—B alloy being produced by quenching a hot melt of said R—Fe—B alloy by a cooling roll method at a peripheral speed of the cooling roll within 5 to 28 m/s.