According to the curies law of magnetism, the intensity of magnetisation (M) of a magnetic material is

• directly proportional to the magnetic induction (B),
• inversely proportional to the temperature (T) of the material.

that is

M α B/T    —(1)

as B α H (magnetic intensity)

Thus equation 1 becomes

M α H/T

or M/H α 1/T

or χ α 1/T     (because magnetic susceptibility x = M/H)

χ = C/T

where C is a constant of proportionality and is called Curie constant

Thus, according to the Curie’s law, magnetic susceptibility is inversely proportional to the temperature of the material.

Reference: This article is referred from my book “electrical engineering materials” having ISBN 978-81-272-5069-0. In case of any doubt, you can put your question in the comment section.