The composition of the magnet is iron, cobalt, nickel and other atoms, the internal structure of the atom is very special, itself has magnetic moment. Magnets can produce magnetic fields and have the properties of attracting ferromagnetic materials such as iron, nickel and cobalt.
Magnet Type: Shape class Magnet: Square magnet, Tile magnet, abnormity magnet, cylindrical magnets, ring magnets, round-chip magnets, magnet magnets, magnetic force magnets, attribute-type magnets: samarium Cobalt Magnets, NdFeB magnets (strong magnets), ferrite magnets, aluminum-nickel cobalt magnets, iron-chromium cobalt magnets, industry-type magnets: magnetic components, motor magnets, Rubber magnet, plastic magnet and other kinds. Magnets are divided into permanent magnets and soft magnets, permanent magnets are coupled with strong magnetism, so that the spin of the magnetic material and the electronic angular momentum in a fixed direction, soft magnetic is coupled with electricity. (also a method with magnetic force), such as electric current remove the soft iron will slowly lose its magnetism.
When the midpoint of a bar magnet is suspended by a thin line, its ends point to the south and north of the Earth, and to one end of the north is called the North Pole or N pole, pointing to the southern end as a guide pole or an S pole.