Regensburg 2002 – wissenschaftliches Programm

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MA: Magnetismus

MA 15: Oberflächenmagnetismus

MA 15.4: Vortrag

Donnerstag, 14. März 2002, 16:00–16:15, H10

Theoretical description of resonant magneto-optical phenomena in the X-ray regime for surface layer systems — •Jan Minar and Hubert Ebert — Department Chemie / Physikalische Chemie,
Universität München, Butenandstr. 5-13, D-81377 München, Germany

A version of the Kubo-formula is presented, that allows to calculate the resonant magneto-optical properties in the X-ray regime for arbitrary materials. This is achieved by representing the underlying electronic structure in terms of the Green’s function. Calculating the Green’s function in the framework of spin-polarised relativistic multiple scattering theory (SPR-KKR) in particular gives access to spin-orbit induced resonant magneto-optical properties [1]. Using the Green’s function formalism allows in a straightforward way to deal with systems without three-dimensional translational symmetry. Two important cases for these are surfaces and disordered alloys. As an example, results of calculations for the X-ray resonant scattering (transverse Kerr effect) in the layered system Fe/Ag will be presented. Recently, Geissler and coworkers [2], investigated the Pt magnetization profile at a Pt/Co interface, using resonant circular X-ray reflectivity measurements. Corresponding calculations have been performed to support the interpretation of these experimental investigations.

[1] J. Minar and H. Ebert, Solid State Commun. 118, 383 (2001).

[2] J. Geissler, E. Goering, M Justen et al., to be published