There are two kinds of magnets: permanent magnets and non-permanent magnets, in which permanent magnets can be natural products, also called natural magnets, and non-permanent magnets will only produce magnetism under certain special conditions.
Types of magnets: shape magnets: square magnets, tile magnets, irregular magnets, cylindrical magnets, ring magnets, disc magnets, bar magnets, magnet frame magnets, nature magnets: samarium cobalt magnets, neodymium magnets, ferrite magnets, Al-Ni-Co magnets, Fe-Cr-Co magnets, industrial magnets: magnetic components, motor magnets, rubber magnets, plastic magnets, etc. Magnets are divided into permanent magnets and soft magnets. Permanent magnets strengthen magnetism, so that the spin of magnetic substances and the angular momentum of electrons are arranged in a fixed direction, while soft magnets are electrified. When the soft iron is removed by equal current, it will gradually lose its magnetism.