Berlin 2008 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 18: Poster I : Bio Magn. (1-2); Mag.Imgaging (3-9); Magn. Semiconductors (10-16); Half Metals & Oxides (17-20); Coupl.Phenomena (21-27); Magn. Mat. (28-41); Micro & Nanostr. Magn. Materials (42-61); Micro Magn. (62-64); Surface Magnetism (65-70); Transport Phenomena (71-85)

MA 18.68: Poster

Dienstag, 26. Februar 2008, 15:15–18:30, Poster E

Combined study of topography and electronic structure of Co/Cu(001) — •Tobias Allmers, Michael Budke, and Markus Donath — Physics Institute, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster

In this contribution we report on results for fcc Co thin films on Cu(001). Our experimental setup allows the combined study of the topography (via scanning tunneling microscopy) and the spin-dependent electronic structure below and above the Fermi-level (via spin- and angle-resolved direct and inverse photoemission) [1]. The influence of different growth conditions on the topography and the electronic structure was investigated. With the possibility to dose adsorbates onto the surface, we were able to distinguish between surface and bulk contributions to the spectral features. We studied quantum-well states, which show up as well defined spectral features for flat interfaces and therefore serve as a sensor for the quality of interfaces [2], as well as the influence of the topography and the adsorbate sensitivity of surface resonance states of Co/Cu(001) [3].

[1] M. Budke, T. Allmers, and M. Donath, Rev. Sci. Instrum., in press (2007)

[2] D.H. Yu, M. Donath, J. Braun, and G. Rangelov, Phys. Rev. B 65, 155415 (2003)

[3] K. Miyamoto et al., 19th International Colloquium on Magnetic Films and Surfaces (2006)