Answer:
Susceptibility of
magnetic material,
where
is the intensity of magnetisation
induced in the material and
is the
magnetising force.
Diamagnetism
is due to orbital motion of electrons in an atom developing magnetic moments
opposite to applied field. Due to it, the resultant magnetic moment of the
diamagnetic material is zero. Hence, susceptibility
of
diamagnetic material is not much affected by temperature.
Paramagnetism
and ferromagnetism is due to alignments of atomic magnetic moments in the
direction of the applied field. As temperature is raised, this alignment is
disturbed, resulting decrease in susceptibility of both, with increase in
temperature.
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