Hard ferrite magnet

A compound having a uniaxial anisotropy of a hexagonal structure. It is mainly composed of three ferrites of lanthanum, cerium and lead and their composite solid solution. There are points of the same magnetic and heterogeneous magnetic. since such a ferrite material retains a strong constant residual magnetic property for a long time after the external magnetization field disappears, it can be used to generate a constant magnetic field to the external space. It is widely used, for example, as a constant magnet in various types of meters, generators, telephones, speakers, televisions and microwave devices.