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

Author:

Frieske H.1,Mahnig M.1

Affiliation:

1. 1Institut für Physikalische Chemie, Universität Münster

Abstract

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 μB 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.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry,General Physics and Astronomy,Mathematical Physics

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