The current commonly used permanent magnet's material

　　The current commonly used permanent magnet's material has the following mentioned types:

　　Rare earth permanent magnet's material, which is a large class of the permanent magnet's material with the maximum energy product, is the intermetallic compound, which makes rare earth elements and iron group elements as the main component ( also called intermetallic compound ).

　　Metallic permanent magnet’s materials. This is a kind of the alloy permanent magnet's material, which makes iron and iron group elements as important components, mainly having aluminum nickel and cobalt ( AlNiCo ) and ferrochrome cobalt (FeCrCo ) of the two kinds of permanent magnetic alloy. The performance and cost of aluminum nickel cobalt alloy permanent magnet is moderate, with early development, performance varies with the chemical composition and manufacturing process range is wide, so the range of application is wide. The characteristic of permanent magnetic alloys is that iron-chromium-cobalt permanent magnetic properties are moderate, but the mechanical properties can do any various mechanical processing and plastic deformation of cold or heat, which can be made into tubular, flake or linear permanent magnetic materials for a variety of special application.

　　Ferrite permanent magnets' material: This is composite oxide magnetic material, which makes Fe2O3 as main group element ( in narrow sense) and magnetic ordered material such as antiferromagnetic material ( generalized ).