Paramagnets are objects that can be slightly attracted by magnets.
Paramagnetism is that some atomic nuclei and neutrons have magnetic moments, which will produce paramagnetism under the action of magnetic field. But its paramagnetic susceptibility is much smaller than the contribution of electrons to paramagnetism. From the perspective of atomic structure, atoms, ions or molecules that make up paramagnetic objects have inner shells that are not filled with electrons. There are inherent magnetic moments in atoms, ions or molecules of such materials. Because their interactions are far less than thermal motion energy, the orientation of magnetic moments is random, making it impossible for materials to form spontaneous magnetization. In classical theory, the magnetic moment can be in any direction in the magnetic field. The magnetic moment produced by atoms or ions in all these materials under the action of magnetic field is very small. Many insulating compounds of transition metals and rare earth elements, free radicals in organic compounds, and a few paramagnetic gases generally follow Curie's law when the susceptibility changes with temperature.
Under the action of magnetic field, the conduction electrons with positive spin and negative spin have different energies, which leads to a small amount of conduction electrons spin backward near the Fermi surface, resulting in a weak paramagnetic effect.