Curie's Law Calculator

Your details

Pick which quantity you want to calculate. The corresponding output becomes the answer; the rest are inputs.
Select a common paramagnetic ion to autofill the Curie constant, or choose Custom to enter your own.
Molar Curie constant of the paramagnetic material. Autofilled from the preset above.
K·m³/mol
Absolute temperature in Kelvin. Must be above 0 K.
K
External magnetic field strength in amperes per metre.
A/m
Magnetic susceptibility (chi)
0.01458

chi = C / T (dimensionless molar quantity)

Magnetization (M)1,458.3333A/m
Curie constant (C)4.375K·m³/mol
Temperature (T)300K
Effective magnetic moment1,668.566mu_B
Susceptibility at 100 K0.04375
Susceptibility at 1000 K0.004375
0.01458
Very weak (T >> room)<0.001Weak-moderate0.001-0.01Strong paramagnetic0.01-0.05Highly paramagnetic0.05+

Magnetic susceptibility = 0.01458 at 300.0 K

  • The magnetic susceptibility is 0.01458, meaning the material magnetizes to about 1.458% of the applied field magnitude per unit density.
  • The effective magnetic moment of 1668.566 mu_B is closest to Dy³+ (4f9, J=15/2) (10.65 mu_B).
  • Curie's Law is a good approximation at this temperature for most paramagnetic salts and dilute paramagnetic ions.
  • Doubling the temperature would halve the susceptibility to 0.00729.

Next stepTo check whether quantum effects or spin-orbit coupling matter for your material, compare the computed effective moment with the spin-only value sqrt(4S(S+1)) mu_B. A large discrepancy indicates significant orbital contributions.

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