Curie constant

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The Curie constant is a material-dependent property that relates a material's magnetic susceptibility to its temperature.

The Curie constant, when expressed in SI units, is given by

[1]

where is the number of magnetic atoms (or molecules) per unit volume, is the Landé g-factor, (9.27400915e-24 J/T or A·m2) is the Bohr magneton, is the angular momentum quantum number and is Boltzmann's constant. For a two-level system with magnetic moment , the formula reduces to

The constant is used in Curie's Law, which states that for a fixed value of a magnetic field, the magnetization of a material is (approximately) inversely proportional to temperature.

This equation was first derived by Pierre Curie.

Because of the relationship between magnetic susceptibility , magnetization and applied magnetic field :

this shows that for a paramagnetic system of non-interacting magnetic moments, magnetization is inversely related to temperature (see Curie's Law).

See also

References

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