Rare earth magnet

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PROBLEM TO BE SOLVED : To provide a rare earth magnet which enables the reduction in high-temperature demagnetizing factor even in the case of largely reducing the amount of using a heavy rare earth element such as Dy or Tb in comparison to a conventional amount, or using no such a heavy rare earth element. SOLUTION : A magnet composed of a sintered compact comprises : R2T14B crystal grains 1 making main phases; and grain boundary phases 3 between R2T14B crystal grains. The sintered compact is controlled in its microstructure so that the grain boundary phases 3 include a grain boundary phase including R, T and M elements at least in the ranges of 60-80% for R, 15-35% for T, and 1-20% for M; the figures show relative percentages of the numbers of the R, T and M elements. COPYRIGHT : (C)2015, JPO&INPIT