Electrical Properties ofα-Fe2O3

Abstract

The conductivity, Seebeck effect, and optical transmission of $\alpha$-${\mathrm{Fe}}_2$ ${\mathrm{O}}_3$ have been analyzed using two alternative models. The first model assumes conduction to occur in the $d$ levels of Fe ions and yields a quantitative fit to the data. Mobility behavior determined with this model is explained in terms of wavy bands. The second model assumes conduction in the $\mathrm{sp}$ bands of oxygen in addition to $d$-level conduction. It is shown qualitatively to be a reasonable model.