The composition of the magnet is an atom such as iron, cobalt, nickel, etc. The internal structure of the atom is rather special, and itself has a magnetic moment. Magnets can generate magnetic fields and have the property of attracting ferromagnetic substances such as iron, nickel, and cobalt.
Shape magnets: square magnets, tile-shaped magnets, special-shaped magnets, cylindrical magnets, ring-shaped magnets, disk magnets, magnet magnets, magnetic magnets, property magnets: samarium cobalt magnets, neodymium-iron-boron magnets ( Strong magnets), ferrite magnets, alnico magnets, iron-chromium cobalt magnets, industrial magnets: magnetic components, motor magnets, rubber magnets, plastic magnets and other types. Magnets are divided into permanent magnets and soft magnets. Permanent magnets are coupled with strong magnets to align the spin and electron angular momentum of the magnetic material in a fixed direction. Soft magnetization is the addition of electricity. (It's also a way to add magnetic force.) When the current is removed, the soft iron slowly loses its magnetic properties.
The midpoint of the bar magnet is suspended with a thin wire. When it is stationary, both ends of the bar magnet will point to the south and north of the earth. The end pointing to the north is called the north pole or N pole, and the end pointing to the south is the guide pole or S pole.
If you think of the Earth as a large magnet, the earth's geomagnetic north pole is a guide pole, and the geomagnetic south pole is the North pole. Between the magnet and the magnet, the magnetic pole of the same name repels and the magnetic pole of the opposite name attracts. Therefore, the compass is exclusive of the South Pole. The compass and North Pole are exclusive, while the compass and the compass are attracted.
Classification: Magnets can be classified into "permanent magnets" and "non-permanent magnets". Permanent magnets can be natural products, also known as natural magnets, or they can be made by hand. Non-permanent magnets, such as electromagnets, will only appear magnetic under certain conditions.