Sintered magnet

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PROBLEM TO BE SOLVED : To provide a Nd2 Fe14 B-based sintered magnet with the high maximum energy product. SOLUTION : The sintered magnet is characterized by including R (where R means at least one of rare earth elements, and contains Nd and/or Pr as an essential element) of 11.7-13.5 mol%, Cu of 0.01-0.1 mol%, B of 5-7 mol%, and the balance Fe substantially, and by having the maximum energy product of 400 kJ/m or more.