Iron nickel copper moment magnetism and magnetic materials
Nickel iron magnet magnetic moment is a square loop of ferrite materials.
Its characteristic is, when a relatively small role in the external magnetic field, can make the magnetization, and saturated, get rid of the external magnetic field, magnetic remain with saturated.
Such as magnesium, manganese ferrite, lithium manganese ferrite, etc.
Pressure magnetic ferrite materials are mainly used for all kinds of electronic computer memory core, etc.
When this kind of material is magnetized in the direction of the magnetic field as a mechanical elongation or shortening of ferrite materials, such as nickel zinc ferrite, nickel copper and nickel chromium ferrite, and so on.
Piezomagnetic materials mainly used for mutual transformation between electromagnetic energy and mechanical energy transducer, magnetostrictive devices used in ultrasound.