1. Soft magnetic materials
This type of material is easy to magnetize and demagnetize under a weak magnetic field, such as zinc-chromium ferrite and nickel-zinc ferrite magnetic rings. Soft ferrite is a ferrite material that has wide uses, many varieties, large quantities, and high output value. It is mainly used as a variety of inductive components, such as filter cores, transformer cores, radio cores, and tape recording and video heads. It is also a key material for magnetic recording components.
2. Permanent magnet materials
This type of ferrite material can still retain strong and constant residual magnetism properties for a long time after the external magnetizing field disappears, and can be used to generate a stable magnetic field in the external space. It is widely used, such as: used as a constant magnet in various types of electricity meters, generators, telephones, speakers, televisions and microwave devices.
3. Gyromagnetic materials
The gyromagnetism of magnetic materials refers to the phenomenon that under the action of two mutually perpendicular stable magnetic fields and electromagnetic wave magnetic fields, plane-polarized electromagnetic waves propagate in a certain direction inside the material, but their polarization planes will continue to rotate around the propagation direction. Most of the gyromagnetic materials are combined with waveguides or transmission lines for transmitting microwaves to form various microwave devices. Mainly used in radar, communications, navigation, telemetry and other electronic equipment.
4. Moment magnetic materials
This refers to ferrite materials with rectangular hysteresis loops. Its characteristic is that when there is a small external magnetic field, it can be magnetized and reach saturation. After the external magnetic field is removed, the magnetism still remains the same as when it was saturated. This ferrite material is mainly used in memory cores of various electronic computers.
5. Piezomagnetic materials
This type of material refers to ferrite materials that mechanically stretch or shorten in the direction of the magnetic field when magnetized, such as nickel-zinc ferrite, nickel-copper ferrite and nickel-chromium ferrite. Piezomagnetic materials are mainly used as transducers for the mutual conversion of electromagnetic energy and mechanical energy, and as magnetostrictive elements for ultrasound.