Susceptibility of magnetic material `x=(I)/(H)` where I is the intensity of magnetisation induced in the material and H is the magnetisting force.
Diamagnetism is due to orbital motion of electrons in an atom developing magnetic moments opposite to applied field. thus, the resultant magnetic moment of the diamagnetic maerial is zero and h ence, the susceptibility z of diamagnetic material is not much affected by temperture
Paramagnetism and ferromagnetism is due to alignments of atomic magnetic moments in the direction of the applied field. as temperature is raised, the alignment is disturbed. resulting decrease in suscapibility of both with increase in temperature.
