RARE EARTH MAGNET PRECURSOR OR RARE EARTH MAGNET MOLDING, AND COMPOSITE MOLDING EMPLOYING THE SAME

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To provide a rare earth magnet precursor or a rare earth magnet molding.SOLUTION : The present invention relates to a rare earth magnet precursor or a rare earth magnet molding having a surface roughened structure on a surface. A face having the surface roughened structure includes a linear projection formed in a length direction and a linear recess formed in the same direction as the length direction, and a plurality of linear projections and linear recesses are formed alternately at equal intervals or different intervals in a direction orthogonal to the length direction. An interval of intermediate positions in a width direction between the plurality of linear projections or an interval of intermediate positions in the width direction of the plurality of linear recesses, ranges from 0.03 mm to 1.0 mm, and unevenness satisfying at least one of requirements of (a) Sa (ISO25178) is 5 to 300 μm, (b) Sz (ISO25178) is 50 to 1500 μm and (c) Sdr (ISO25178) is 0.3 to 12, is formed on the face having the surface roughened structure.SELECTED DRAWING : None