| 摘要 |
PURPOSE:To obtain a permanent magnet wherein an intensive magnetic pole is formed at a specified position of a member to be magnetized, by a method wherein leakage flux is prevented from permeating into the member to be magnetized, by arranging perfect diamagnet ic material around the member to be magnetized, and the magnetic path and the direction of magnetizing flux itself are controlled. CONSTITUTION:Perfect diamagnetic members 3A-3C act so as to repel leakage flux toward a member to be magnetized, so that the magnetizing action of the member to be magnetized is increased, and the effect is remarkable in the case of manufacturing a multipole magnet. In the example wherein a ring type member 2 to be magnetized is subjected to magnetization with magnetic poles 1A-1D of one or more magnetizing yokes, the interference caused by mutual leakage flux of yokes can be prevented by inserting the perfect diamagnetic members 3A-3C between the magnetic poles of each magnetizing yoke. Further, by arranging the perfect diamagnetic member 3D on the outer periphery of the ring type member to be magnet ized, a magnet can be manufactured, wherein leakage magnetic flux from the outer periphery is pervented, magnetic poles are concentrated on the inner periphery, and the generation of magnetic poles on the outer periphery is restricted. The perfect diamagnetic member can be selected from superconducting materials. Thereby, a permanent magnet can be obtained wherein the intensity of magnetization is large, and pole position is clear.
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