Diamagnetism

Diamagnetism is a form of magnetism observed in materials that create a weak repulsion when exposed to a magnetic field. This occurs because the electrons in the atoms of diamagnetic materials rearrange slightly, generating a small, opposing magnetic field. Examples of diamagnetic materials include bismuth, copper, and graphite. Unlike ferromagnetic materials (which are strongly attracted to magnets), diamagnetic materials do not retain magnetism once the external field is removed and typically display this effect only when a magnetic field is applied. It’s a subtle but fascinating aspect of how materials interact with magnetic fields.