Diamagnetism is a magnetic response in which the induced magnetization opposes the applied magnetic field intensity. In a linear isotropic description, with negative magnetic susceptibility .
Landau diamagnetism is the orbital response of mobile Electrons to an applied magnetic field, arising from quantization of their transverse motion. For a noninteracting three-dimensional isotropic Electron gas with quadratic dispersion, electron spin with and magnetic fields weak enough for the smooth-response limit, its susceptibility is , where is the Pauli paramagnetism susceptibility. Band effective masses, interactions, dimensionality and resolved magnetic quantum oscillations can change this simple relation.
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Diamagnetism is a form of magnetism that occurs in materials that are not attracted to magnetic fields. It is characterized by the phenomenon where certain materials weakly repel magnetic fields. This property arises due to the motion of electrons within atoms. When an external magnetic field is applied to a diamagnetic material, the magnetic field induces a temporary change in the orbital motion of the electrons, leading to the generation of a weak magnetic field in the opposite direction.