The composition of magnets is iron, cobalt, nickel and other atoms, the internal structure of its atoms is relatively special, and it has its own magnetic moment. Magnets can generate magnetic fields and have the property of absorbing ferromagnetic substances such as iron, nickel, cobalt and other metals. Magnet varieties: Shape magnets: square magnets, tile magnets, special-shaped magnets, cylindrical magnets, ring magnets, disc magnets, bar magnets, magnetic frame magnets, attribute magnets: samarium cobalt magnets, neodymium iron boron magnets ( Strong magnets), ferrite magnets, AlNiCo magnets, FeCrCo magnets, industry magnets: magnetic components, motor magnets, rubber magnets, plastic magnets, etc.
Magnets are divided into permanent magnets and soft magnets. Permanent magnets are combined with strong magnetism, so that the spin of magnetic substances and electron angular momentum are arranged in a fixed direction, and soft magnetism is added with electricity. (It is also a way to add magnetism) The soft iron will gradually lose its magnetism when the current is removed. The midpoint of the bar magnet is suspended with a thin wire. When it is stationary, its two ends 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 imagine the earth as a big magnet, the earth's magnetic north pole is the compass pole, and the magnetic south pole is the north pole. Between the magnet and the magnet, the magnetic poles of the same name are repelled, and the magnetic poles of the same name are absorbed. So, the compass repels the south pole, the north hand repels the north pole, and the compass absorbs the north hand.
Classification: Magnets can be divided into permanent magnets and non-permanent magnets. Permanent magnets can be natural products, also known as natural lodestones, or artificially made. Non-permanent magnets, such as electromagnets, are only magnetic under certain conditions.