# Curie’s Law

### Curie’s Law

The Curie Law is defined as, in a paramagnetic material, the materials magnetization is directly proportional to an applied magnetic field, but the case is not the same when the material is heated. When it is heated, the relation is reversed. i.e.

The magnetization becomes inversely proportional to the temperature.

$$M\,\,=\,\,C\times \left( \frac{B}{T} \right)$$

Where,

M = Magnetization,

B = Magnetic Field,

T = Temperature,

G = Specific Curie Constant.

This concept was proposed by Pierre Currie and the concept holds good for high temperature and weak magnetic fields. Various experiments by Pierre Curie showed that high for many substances the susceptibility is inversely proportional to the absolute temperature.

$$\chi \,\,=\,\,\frac{C}{T}$$.

Where,

= Curie Constant,

$$\chi$$ = Susceptibility,

T= Temperature.

This relationship is defined as the Curie’s Law and this equation may also be modified to,

$$\chi \,\,=\,\,\frac{C}{\left( T-\theta \right)}$$

Where,

θ = Constant.

Curie’s law holds good for high temperature and not so strong magnetic fields.