Introduction:
In this question, we are discussing the variation of susceptibility with temperature in different types of magnetic materials. Susceptibility is a measure of how easily a material can be magnetized in the presence of an external magnetic field. The susceptibility of a material can vary with temperature, and different types of magnetic materials exhibit different behaviors.

Ferromagnetic Materials:
Ferromagnetic materials are known for their strong magnetic properties. In these materials, the magnetic moments of individual atoms align in a parallel manner, resulting in a strong overall magnetization. However, with an increase in temperature, the thermal energy disrupts the alignment of magnetic moments, leading to a decrease in the overall magnetization. Thus, the susceptibility of ferromagnetic materials decreases with increasing temperature.

Anti-ferromagnetic Materials:
In anti-ferromagnetic materials, adjacent magnetic moments align in opposite directions, resulting in the cancellation of their magnetic effects at the macroscopic level. These materials have a relatively small susceptibility at all temperatures. When the temperature increases, the thermal energy disrupts the anti-parallel alignment of magnetic moments, reducing the overall magnetization and thus decreasing the susceptibility further.

Ferrimagnetic Materials:
Ferrimagnetic materials have a similar magnetic structure to ferromagnetic materials, but with unequal magnitudes of magnetic moments. The magnetic moments of different atoms align in a parallel or anti-parallel manner, resulting in a net magnetization. With an increase in temperature, the thermal energy disrupts the alignment of magnetic moments, reducing the overall magnetization and decreasing the susceptibility.

Superparamagnetic Materials:
Superparamagnetic materials consist of small magnetic particles that exhibit magnetic behavior at the nanoscale but not at the macroscopic level. These materials have a relatively small susceptibility at all temperatures due to the random orientation of magnetic moments. When the temperature increases, the thermal energy dominates, causing the magnetic moments to fluctuate and lose their alignment, resulting in a decrease in susceptibility.

Conclusion:
In summary, the susceptibility of anti-ferromagnetic materials decreases with an increase in temperature. These materials also have relatively small susceptibility values at all temperatures. It is important to understand the behavior of different magnetic materials with temperature to predict their magnetic properties accurately and utilize them in various applications.