Toda Kogyo Corporation

Satoshi Nakatsuka

Osamu Sasaki

Masaharu Abe

An anisotropic permanent magnet with an improved surface magnetic field peak value is provided, which has at least one active surface and is oriented and magnetized simultaneously in such a manner that axes of easy magnetization of magnetic powder constituting the permanent magnet pass from the active surface through an interior of the magnet to return to the active surface, wherein a standard magnetic pole and a background opposite magnetic pole are present as an island and a sea, and the ratio of an area of the standard magnetic pole to an area of the background opposite magnetic pole is 9 to 90:91 to 10. Also, a permanent magnet for attraction with an improved attraction force is provided, wherein a total area &Sgr;S of an S pole surface and a total area &Sgr;N of an N pole surface satisfy a relationship: 0.5&times;&Sgr;S&lE;&Sgr;N&lE;2.0&times;&Sgr;S or 0. 5&times;&Sgr;N&lE;&Sgr;S&lE;2.0&times;&Sgr;N.

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Hiroshima-ken, Japan

Satoshi Nakatsuka