Report

Help us improve this tool

Curie Constant Calculator

Calculate Curie constant from magnetic susceptibility and temperature

O M T

What Is the Curie Constant?

The Curie constant characterizes how strongly a paramagnetic material responds to temperature changes. It links magnetic susceptibility to absolute temperature through Curie's law, which applies above the Curie temperature in paramagnetic regions.

Curie Constant Formula

$$C = \chi \, T$$

\(C\) is the Curie constant (K), \(\chi\) is the dimensionless magnetic susceptibility, and \(T\) is absolute temperature (K). Knowing any two values lets you solve for the third.

Example: if \(\chi = 0.001\) at \(T = 300\) K, then \(C = 0.001 \times 300 = 0.3\) K.

Paramagnetism and Curie's Law

In the paramagnetic regime, susceptibility falls as temperature rises: \(\chi = C/T\). Materials like aluminum, platinum, and rare-earth salts follow this behavior at sufficiently high temperatures.

Frequently Asked Questions

What are the units of the Curie constant?

In this form of Curie's law, C has units of kelvin (K) when χ is dimensionless and T is in kelvin.

How is this different from Curie's law?

Curie's law states χ = C/T. The Curie constant C is the proportionality factor connecting susceptibility and temperature.

When does Curie's law apply?

Above the Curie temperature in the paramagnetic region, where thermal energy dominates and magnetic moments align weakly with an applied field.

Can I solve for any variable?

Yes. Select whether to find C, χ, or T and enter the other two positive values. The calculator rearranges C = χT automatically.

Why must temperature be in kelvin?

Curie's law requires absolute temperature. Using Celsius would break the linear χ versus 1/T relationship.