Ningbo Tengxiao Magnetic Industry Co., Ltd. is a professional supplier of magnetic products and magnetic equipment, specializing in the production of high-quality neodymium iron boron magnets, magnetic badges and other magnetic equipment as well as custom magnetic components.
As early as 1820, the Danish scientist Oersted discovered the magnetic effect of electric current, and for the first time revealed the connection between magnetism and electricity, thereby linking electricity and magnetism.
In order to explain the phenomenon of permanent magnetization and magnetization, Ampere proposed the molecular current hypothesis. Ampere believes that there are circular currents in the molecules of any substance, called molecular currents, and molecular currents are equivalent to a primitive magnet. When the substance does not have magnetism in the macroscopic view, the orientation of these molecular currents is irregular, and their magnetic effects on the outside world cancel each other out, so the whole object is not magnetic. Under the action of the external magnetic field, each molecular current equivalent to the elementary magnet tends to be oriented along the direction of the external magnetic field, making the object display magnetic.
There is an essential connection between magnetic and electrical phenomena. The magnetism of matter is closely related to the movement structure of electrons. The concept of electron spin first proposed by Uhlenbeck and Goldschmidt is to regard an electron as a small charged ball. They believe that it is similar to the movement of the earth around the sun. On the one hand, electrons revolve around the nucleus and have corresponding orbits. Angular momentum and orbital magnetic moment, on the other hand, spin around its own axis, with spin angular momentum and corresponding spin magnetic moment. The magnetic moment measured by Stern-Gerlach from the silver atomic ray experiment is exactly this spin magnetic moment. (People think it is incorrect to think of the spin of an electron as the rotation of a small ball around its axis.)
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