Explain the graph of susceptibility versus temperature.

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Solution

Susceptibility vs Temperature:
Type of Magnetism Formula Diagram
Paramagnetic Materials
Susceptibility for paramagnetic substance is given as,
$χ_{p a r a} = \frac{C}{T}$
where, $C$ is the Curie constant; $T$ is the temperature.
Ferromagnetic Materials
Susceptibility for ferromagnetic substance is given as,
$χ_{f e r r o} = \frac{C}{T - T_{C}}$
where, $T_{C}$ is the Curie temperature above which ferromagnetic substance behaves as a paramagnetic one.
Antiferromagnetic Materials
Susceptibility for Antiferromagnetic substance is given as,
$χ_{a n t i f} = \frac{C}{T + θ}$
where, $θ$ is called the asymptotic Curie temperature.

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