The composition of the magnet is iron, cobalt, nickel and other atoms. The internal structure of the atom is relatively special, and it has a magnetic moment itself. A magnet can generate a magnetic field and has the property of attracting ferromagnetic substances such as iron, nickel, cobalt and other metals. Magnet types: 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 ( Powerful magnets), ferrite magnets, alnico magnets, iron chromium cobalt magnets, industry magnets: magnetic components, motor magnets, rubber magnets, plastic magnets, etc. Magnets are divided into permanent magnets and soft magnets. Permanent magnets are added with strong magnetism, so that the spin of the magnetic substance and the angular momentum of electrons are aligned in a fixed direction, while soft magnetism is added with electricity. (It is also a method of adding magnetic force) Waiting for the current to remove the soft iron will slowly lose its magnetism. Suspend the midpoint of the bar magnet with a thin wire. When it is at rest, 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 called the index pole or S pole. pole. If you think of the earth as a large magnet, the magnetic north pole of the earth is the compass pole, and the magnetic south pole is the north pole. Between magnets, magnetic poles with the same name repel each other, and magnetic poles with different names attract each other. So, the compass repels the South Pole, the North Arrow repels the North Pole, and the Compass attracts the North Arrow. 
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GET A QUOTEThis neodymium magnetic disc has a diameter of 50mm and a height of 25mm. It has a magnetic flux reading of 4664 Gauss and a pull force of 68.22 kilos. Strong magnets, like this Rare Earth disc, project a powerful magnetic field that is capable of penetrating solid materials such as timber, glass or plastic. This ability has practical applications for tradespeople and engineers where strong magnets can be used to detect metal or become components in sensitive alarm systems and security locks.
