RARE EARTH SINTERED MAGNET AND METHOD FOR PRODUCTION THEREOF

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A rare earth sintered magnet which comprises 12.0 atomic % to 15.0 atomic % of a rare earth element (which is at least one element selected from the group consisting of Nd, Pr, Gd, Tb, Dy and Ho and contains Nd and/or Pr in an amount of 50 % or more), 5.5 atomic % to 8.5 atomic % of boron (B), a prescribed amount of an additive metal A, and the balanced amount of iron (Fe) and inevitable impurities. The prescribed amount of an additive metal A is at least one of 0.005 atomic % to 0.30 atomic % of silver (Ag), 0.005 atomic % to 0.40 atomic % of nickel (Ni) and 0.005 atomic % to 0.20 atomic % of gold (Au).