SINTERED RARE EARTH PERMANENT MAGNET AND MANUFACTURING METHOD THEREOF

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PROBLEM TO BE SOLVED : To provide a sintered rare earth permanent magnet excellent in corrosion resistance and further improved in magnetic characteristics by low oxygenation. SOLUTION : The sintered rare earth permanent magnet is employed with the composition of 27.0-34.0% of R (R is at least one kind or more of rare earth element containing Y), 0.5-2.0% of B, 0.03-0.10% of O, 0.05-0.25% of N, 0.15% or less of C, 0.003% or less of H in wt.% and the residue of Fe while the contained amount of N is more than the contained amount of O. Preferably, the permanent magnet contains one kind or two or more kinds among 0.2-0.5% of Co, 0.05-0.5% of Nb, 0.01-0.5% of Al, 0.01-0.3% of Ga, 0.01-0.5% of Cu and 0.005-0.05% of P in wt.%.