For good conductors such as gold or copper, the Fermi level lies within the "sp" band, and the "d" band is completely filled. In ferromagnets, the dependence of electron-atom scattering on the orientation of their magnetic moments is related to the filling of the band responsible for the magnetic properties of the metal, e.g., 3"d" band for iron, nickel or cobalt. The "d" band of ferromagnets is split, as it contains a different number of electrons with spins directed up and down. Therefore, the density of electronic states at the Fermi level is also different for spins pointing in opposite directions. The Fermi level for majority-spin electrons is located within the "sp" band, and their transport is similar in ferromagnets and non-magnetic metals. For minority-spin electrons the "sp" and "d" bands are hybridized, and the Fermi level lies within the "d" band. The hybridized "spd" band has a high density of states, which results in stronger scattering and thus shorter mean free path λ for minority-spin than majority-spin electrons. In cobalt-doped nickel, the ratio λ↑/λ↓ can reach 20.