Curie constant

The Curie constant (after Pierre Curie ) is a quantity from the field of magnetism , which is constant for a substance and has the dimension of a temperature : ${\displaystyle C}$

${\displaystyle C=\mu _{0}\cdot n\cdot {\frac {\mu ^{2}}{3k_{\mathrm {B} }}}}$

With

• the permeability of the vacuum ${\displaystyle \mu _{0}}$
• the particle density ${\displaystyle n={\tfrac {N}{V}}}$
  • the number of particles ${\displaystyle N}$
  • the volume ${\displaystyle V}$
• the atomic magnetic moment ${\displaystyle \mu }$
• the Boltzmann constant . ${\displaystyle k_{\mathrm {B} }}$

Instead of the volume, the Curie constant is often related to the amount of substance : ${\displaystyle n}$

${\displaystyle C_{\mathrm {mol} }={\frac {M}{\rho }}C=\mu _{0}\cdot N_{\mathrm {A} }\cdot {\frac {\mu ^{2}}{3k_{\mathrm {B} }}}}$

With

• the molar mass ${\displaystyle M}$
• the density ${\displaystyle \rho }$
• the Avogadro constant . ${\displaystyle N_{\mathrm {A} }={\tfrac {N}{n}}}$

The dimension of is m ³ K mol ⁻¹ . ${\displaystyle C_{\mathrm {mol} }}$  

See also

• Curies law
• Curie-Weiss law
• Curie temperature

literature

• Heiko Lueken : Magnetochemistry . BG Teubner, Stuttgart / Leipzig 1999, ISBN 3-519-03530-8 .

Web links

• Introduction to Magnetism (accessed December 12, 2019)
• Magnetic Properties of Materials (IGP) (accessed December 12, 2019)
• Determination of diagnostic magnetic transition temperatures of synthetic titanomagnetites and ilmenite-hematite mixed crystals (accessed on December 12, 2019)
• Magnetism: Fundamentals and Applications (accessed December 12, 2019)
• A contribution to the antiferromagnetism of the face-centered cubic iron lattice (accessed December 12, 2019)