Curie konstant
Curie konstant (Pierre Curie järgi), tähis C {\displaystyle C} , on aine magnetilisi omadusi iseloomustav konstant: C = μ 0 ⋅ n i ⋅ μ 2 3 k B , {\displaystyle C=\mu _{0}\cdot n_{i}\cdot {\frac {\mu ^{2}}{3k_{\mathrm {B} }}},} kus μ 0 {\displaystyle \mu _{0}} on vaakumi magnetiline läbitavus; n i = N V {\displaystyle n_{i}={\tfrac {N}{V}}} on osakeste tihedus, kusjuures N {\displaystyle N} on osakeste arv; V {\displaystyle V} on ruumala; μ {\displaystyle \mu } on atomaarne magnetiline moment; k B {\displaystyle k_{\mathrm {B} }} on Boltzmanni konstant. Konstandi C {\displaystyle C} dimensioon on temperatuur. Sageli määratletakse Curie konstanti ka ainehulgast n {\displaystyle n} lähtuvalt: C m o l = M ρ C = μ 0 ⋅ N A ⋅ μ 2 3 k B , {\displaystyle C_{\mathrm {mol} }={\frac {M}{\rho }}C=\mu _{0}\cdot N_{\mathrm {A} }\cdot {\frac {\mu ^{2}}{3k_{\mathrm {B} }}},} kus M {\displaystyle M} on molaarmass; ρ {\displaystyle \rho } on tihedus; N A = N n {\displaystyle N_{\mathrm {A} }={\tfrac {N}{n}}} on Avogadro arv. Konstandi C m o l {\displaystyle C_{\mathrm {mol} }} mõõtühik on m3 K mol−1.