The basic principle of magnets

A magnet is a substance that generates a magnetic field, which derives its magnetism from the motion and spin of electrons inside an atom. In nature, the most common natural magnets are magnetite (Fe₃O₄), while man-made magnets include materials such as iron, nickel, and cobalt.

The main types of magnets

Permanent magnets: such as NdFeB (NdFeB), samarium cobalt (SmCo), etc., are widely used in electronic equipment, maglev trains, etc.

Electromagnet: The magnetic field generated by the current, can freely control the magnetic switch, common in motors, transformers and other equipment.

Soft magnetic materials, such as silicon steel sheets, used in power equipment to reduce energy loss.

The practical application of magnets

Science and technology: hard disk drives, MRI (magnetic resonance imaging), etc.

Industrial manufacturing: motor, loudspeaker, magnetic separator.

Daily life: refrigerator magnets, wireless charging, magnetic locks, etc.

Although the magnet is small, but widely used, its research is still continuing to advance, the future or will be used in quantum computing, clean energy and other fields.