The electrical resistivities of Fe-Co alloys owing to random alloy disorder are calculated using the Kubo-Greenwood formula. The obtained electrical resistivities agree well with experimental data quantitatively at low temperature. The spin polarization of Fe50 Co50 estimated from the conductivity (86%) has opposite sign to that from the densities of the states at the Fermi level (-73%). It is found that the conductivity is governed mainly by s electrons, and the s electrons in the minority spin states are less conductive due to strong scattering by the large densities of the states of d electrons than the majority spin electrons.
ASJC Scopus subject areas
- Physics and Astronomy(all)