A study of semihard magnet alloys for latching reed relays

A study of Fe-Ni semihard magnet alloys to be used for fereed switches or latching relays is reported. As a result of this study, it has been found that the Fe-Ni alloys can be improved as follows. 1) By adding Al and Ti to Fe-Ni alloys, these alloys can maintain their high residual magnetization. 2) By applying uni-axializing treatment to them, the square hysteresis loop of these alloys can be notably improved. It has also been made clear that such improvement in magnetic characteristics is due to the magnetic anisotropy developed in the rolling direction by the uniaxializing treatment. Fe-Ni alloys are economical materials with excellent square hysteresis loop and workability. Therefore, they have been studied as materials for various types of switching matrices.