| 简介 |
PROBLEM TO BE SOLVED : To provide an isotropic bulk magnet which can reduce the amount of rare earth element used, and which makes it possible to ensure a residual magnetic flux density (Br) and a practical coercive force (Hc).SOLUTION : An isotropic bulk magnet according to the present invention comprises : a Nd-Fe-B based magnet region (A) including 12 at% or less of a rare earth element; and a Nd-Fe-B based magnet region (B) including more than 12 at% of a rare earth element. It is preferred that the Nd-Fe-B based magnet region (A) or Nd-Fe-B based magnet region (B) includes, as the rare earth element, Nd, and at least one element (e1) selected from a group consisting of Sc, Y, La, Ce, Pr, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu.SELECTED DRAWING : Figure 1 |
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