Giant magnetic moment dynamics in Pd

We investigate the magnetic behavior of one substitutional Fe impurity on a Pd host, near the surface and in the bulk. We employ an itinerant electron picture and an underlying realistic electronic structure including the five d bands and the sp electrons. The ferromagnetic ground state is obtained...

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Bibliographic Details
Published in:Physica Status Solidi (b) 2004-08, Vol.241 (10), p.2415-2418
Main Authors: Tovar Costa, M. V., de Castro Barbosa, A. C., Costa Jr, A. T.
Format: Article
Language:English
Subjects:
75.20.En
75.30.Ds
75.40.Gb
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Physics
Studies of specific magnetic materials
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Summary:We investigate the magnetic behavior of one substitutional Fe impurity on a Pd host, near the surface and in the bulk. We employ an itinerant electron picture and an underlying realistic electronic structure including the five d bands and the sp electrons. The ferromagnetic ground state is obtained by treating the on‐site Coulomb repulsion self‐consistently in mean field approximation. We obtain the spectrum of magnetic excitations by calculating the transverse dynamic susceptibility in the Random Phase Approximation. Our results reproduce qualitatively the strong polarization observed in such systems. We show that the magnetic excitations of the cluster formed by the Fe impurity and the surrounding polarized Pd atoms are strongly damped. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.200304915