How are soft magnetic materials and hard magnetic materials classified?What's the difference between them?
Hard magnetic materials: large coercivity (Hc) (>102A/m), Br high remanence hysteresis, large area, big loss. Such as tungsten steel, carbon steel, aluminum nickel cobalt alloy. Purpose: the hysteresis loop width fertilizer after magnetization can keep strong magnetic long, suitable for the production of magnetoelectric meters of permanent magnet the headset, permanent magnet, permanent magnet loudspeaker.
) soft magnetic materials: permeability, easy magnetization and demagnetization (initial magnetization rate). The saturation magnetization, coercivity (Hc), the hysteresis area is narrow and long, low loss (HdB area). Including magnetic iron, silicon steel permalloy (Fe, Ni) ferrite body. Suitable for relay, motor, and various components of the magnetic core, high frequency electromagnetic magnet.
Rectangular magnetic material: Br=BS, Hc, hysteresis loop is rectangle. Such as magnesium manganese ferrite, lithium manganese ferrite. The hysteresis loop is rectangle and the remanence in the two directions of the computer can be used to represent a binary "0" and "1", so it is suitable for making "memory" element.
