Patent ID: 7045923

Claim:
A magnetizing method for obtaining a permanent magnet for a motor by magnetizing a material to be magnetized wherein: an attenuation body made of a conductive material is arranged in contact with or close to at least one surface of the material which is nonconductive; thereafter a magnetization field is impressed; at least a part of magnetic flux of the magnetization field penetrates both the attenuation body and the surface in contact with or close to the attenuation body simultaneously; and the magnetization is performed by a so-called pulse magnetic field which is rapidly intensified and thereafter weakened with respect to elapse of time; the material has a platy shape or a tubular shape; the material is magnetized in a thickness direction; the attenuation body is located along the surface of the material on at least one side in the thickness direction; and a surface resistance of the attenuation body expressed by Rs satisfies the formula 3.0×10−5≦ Rs≦ 1.0×10−2 [Ω/sq.] (1).