Zum paramagnetischen Verhalten von Palladium-Eisen- und Palladium-Eisen-Wasserstoff-Legierungen / On the Paramagnetic Behavior of Palladium-Iron and Palladium-lron-Hydrogen Alloys

Abstract

An evaluation for the paramagnetic susceptibilities of Pd/Fe and Pd/Fe/H alloys is proposed which accounts for the filling of the bands by electrons from the iron atoms. The susceptibilities are split into a "band" and an "iron" contribution, the latter of which exhibits Curie-Weiss behavior. Reevaluation of Gerstenberg's data yields a magnetic moment of 5.9 μ_B per iron atom. For hydrogenated Pd/Fe alloys the coupling constant characteristic of the "iron" contribution to the susceptibility could be split into two contributions as well, of which the "d-band" contribution depends only on the electron concentration; the limiting values for high electron concentrations are proportional to the iron content of the alloy. Both separations indicate again that every Fe atom donates 3 electrons into the delocalized states of the alloy. The magnetic moment found here, however, is not in agreement with results derived from neutron diffraction experiments.