The main four magnetic properties of Materials of permanent magnets

　　Materials of permanent magnets mainly have 4 kinds of magnetic properties:

　　Firstly, the high maximum magnetic energy product. The maximum magnetic energy product [ symbols for (BH) m] is volume storage per unit and the maximum magnetic energy density that a measure of the permanent magnetic material can use and store.

　　Secondly, high coercive force ( magnetic ). Coercive force [ symbols for (H) c] is measurements of permanent magnetic material to resist magnetic and non magnetic disturbance and maintain its permanent magnets’ feature.

　　Thirdly, the residual magnetic flux density is high ( symbol Br ) and high remanent magnetization ( symbol Mr ). It is a measure of the strength of the magnetic field in air gap of permanent magnets' material.

　　Fourthly, high stability. That external interference magnetic field and temperature, vibration, and other environmental factors change high stability.