Electron Transport and Lorenz Number in Iron

Measurements of the electrical and thermal resistivity in longitudinally saturated $〈111〉$ iron crystals provide evidence that the temperature-dependent transport is dominated by electron-electron scattering from 0.28 to 20°K. The ideal Lorenz number is nearly constant below 40°K and has a value of 1.09 × ${10}^{-8\mathrm{}}$ W Ω/${\mathrm{deg}}^2$ from 40 to 6°K and a value of 1.16 × ${10}^{-8\mathrm{}}$ W Ω/${\mathrm{deg}}^2$ below 6°K.