Abstract
The magnetic properties of the anisotropic MK permanent magnet are the most excellent in commercial magnets. Its applications to industrial field are now expanding. In this report, magnetic properties, magnetic agings and industrial applications of this permanent magnet were investigated.
The magnetic properties of this magnet are listed in Table 1.
Effects of various demagnetizing factors on the magnetic stability were examined. The ratio of remanent induction decreased was in proportion to logarithm of numbers subjected to repeated demagnetization, such as alternative field, mechanical shock and attraction of iron. As for the efficient use of magnet materials, the method of design in a static circuit was illustrated numericaly. Determination of leakage factors was difficult. The leakage flux depends on the reluctance of air gap in similar circuit. As the representative example of industrial uses, mention was made on permanent magnets for speaker and magnetron.
