A paramagnetic material is one whose atoms do
have permanent dipole moments,
but the magic of ferromagnetism is not active.
If a magnetic field is applied to such a material, the dipole moments try
to line up with the magnetic field, but are prevented from becoming
perfectly aligned by their random thermal motion.
Because the dipoles try to line up with the applied field, the susceptibilities
of such materials are positive, but in the absence of the strong
ferromagnetic effect, the susceptibilities are rather small,
say in the range 
to 
.
If on the average only a relatively small fraction of the atoms are
aligned with the field (say 30% or less), then the magnetization
obeys
Curie's law:
where C is a constant (different for each different material),
where T is the temperature in kelvins, and where 
is the
applied magnetic field.
Curie's law says that if is increased, the magnetization increases
(the stronger magnetic field aligns more of the dipoles).
It also says that
if the temperature is increased, the magnetization decreases
(the increased thermal agitation helps prevent alignment).
Curie's law only works for samples in which only a
relatively small fraction of the atoms
are aligned, on the average, with the magnetic field.
When the aligned fraction becomes larger, Curie's law no longer holds because
it predicts that the magnetization just goes up forever with increasing
applied magnetic field .
But this can't be true because once the dipoles are 100% aligned, further
increases in the magnetization are impossible.
When this happens we say that the material is
saturated, and further increases in or decreases in T will not
change the magnetization very much because the atoms are about as aligned
as they can get.
When a paramagnetic material is placed in a strong magnetic field, it becomes a magnet, and as long as the strong magnetic field is present, it will attract and repel other magnets in the usual way. But when the strong magnetic field is removed, the net magnetic alignment is lost as the dipoles relax back to their normal random motion.