Magnetic materials, types, characteristics
Ferrimagnetic material: a material having ferrimagnetic properties, such as various ferrites, having a greater magnetization when added to the magnetic field below the Nair temperature
Permanent magnetic materials: magnet is magnetized to thick except still has a strong magnetic field, is characterized by high coercive force and magnetic energy product. Can be divided into three categories, metal cases, permanent magnet, alnico, NdFeB rare earth cobalt, etc. ferrite magnet, with barium ferrite, strontium ferrite and other permanent magnets, such as plastic.
Ferromagnetic material: ferromagnetic material, such as iron, nickel, cobalt and their alloys, some rare earth alloys. When Curie is below, plus the external magnetic, the material has greater magnetization
Features: resistivity is higher than metal, about 1-10 (12 times) cm / cm, therefore, vortex loss and skin effect is small, suitable for high frequency use. Saturation magnetization is low, it is not suitable for high magnetic density occasions. Curie temperature is relatively low
