Explanation

Because the direction of the induced magnetic field formed in the materials is opposite to the direction of the external magnetic field, the materials shows the phenomenon of rejecting the external magnetic field. The permeability of diamagnetic materials is not greater than. diamagnetism is a kind of quantum mechanical effect: the electrons near each atom that makes up the matter permanently orbit around the atomic nucleus, and the current generated by the external magnetic field always tries to stop the movement of electrons; The induced magnetic field of the current is opposite to the direction of the external magnetic field, which makes the materials show diamagnetism. diamagnetism is a universal phenomenon, and any materials in nature has diamagnetism. The diamagnetic properties of most materials will not lead to changes that can be observed by the naked eye. Ferromagnetic, ferromagnetic and paramagnetic materials also have diamagnetism; But the contribution of diamagnetism to the overall magnetic behavior of these materials is so small that it can be ignored. superconducting materials exhibit complete diamagnetism: according to the Meissner effect, except for the surface area with limited thickness. The interior of superconducting materials will completely prevent the external magnetic field from passing through.

Classification