Regensburg 2002 – wissenschaftliches Programm

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MA: Magnetismus

MA 15: Oberflächenmagnetismus

MA 15.6: Vortrag

Donnerstag, 14. März 2002, 16:30–16:45, H10

Electronic and Magnetic Properties of Interfaces Obtained by Dichroic Core-Level Photoemission — •Jürgen Henk and Arthur Ernst — MPI für Mikrostrukturphysik, Halle (Saale)

The magnetic and electronic structures of an interface between a ferromagnetic and a nonmagnetic material can be investigated by means of magnetic dichroism in core-level photoemission. The spin- and angle-resolved dichroic photocurrent depends on the properties of the two constituents at the interface (e. g., exchange and spin-orbit splitting, hybridization, magnetic ordering, core-level shift) and on the thickness of the covering layer. In this contribution we analyze theoretically how these properties manifest themselves qualitatively and quantitatively in the photoemission spectra.

As prototypical systems, we choose ultrathin films of Fe and Pd because of their large exchange and spin-orbit splittings, respectively. The ground-state properties were obtained by spin-polarised ab-initio layer-KKR calculations. The spin- and angle-resolved photocurrent – calculated within the relativistic one-step model of photoemission as formulated in multiple-scattering theory [1] – is analyzed with respect to the element- and site-specific electronic and magnetic properties.

[1] J. Henk, A. M. N. Niklasson, and B. Johansson, Phys. Rev. B 59 (1999) 13 986.