The exchange coupling effect in amorphous magnetic materials
Diamagnetic substance after magnetization also very weak intensity, magnetic field direction and magnetic field in the opposite direction, after the external magnetic field is removed almost completely disappeared.
Ferromagnetic materials are ferromagnetic materials by strong magnetization and the magnetic field direction and the direction of the original agreement, when the external magnetic field, the magnetic materials are still the remaining part is usually made of magnet magnetization and demagnetization called difficulty can be divided into two categories: after removal of the easy magnetization is called magnetic material of soft magnetic materials it is not easy magnetization of magnetic material called hard magnetic materials to go after.
Broadly divided into three categories: paramagnetic material, diamagnetic material,The paramagnetic material is weakly magnetized, the ferromagnetic field agrees with the original direction, and the external magnetic field is removed and almost completely disappears
