The electronic density of states of amorphous Y-Fe and Tb-Fe alloys

Amorphous Y0.21Fe0.79 and Tb0.21Fe0.79 alloys were examined by photoemission and inverse photoemission to obtain the densities of states within ±15 eV of the Fermi level. Assuming a value of 1.8 eV for the exchange splitting of Fe, the measured densitites of Fe d-like states in both alloys could be decomposed into majority and minority spin bands, and the magnetic moment of Fe derived therefrom appears to be consistent with the splitting of the Fe 3s-core level. These results are then compared with theoretical predictions for the behavior of amorphous transition metal alloys.