Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)
O 35.30: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster B
Complex quantum well states/resonances in magnetic thin films — •Christoph Seibel1, Andreas Nuber1, and Friedrich Reinert1,2 — 1Physikalisches Institut, Experimentelle Physik VII und Wilhelm Conrad Röntgen Research Center for Complex Material Systems (RCCM), Universität Würzburg, D-97074 Würzburg — 2Gemeinschaftslabor für Nanoanalytik, Karlsruher Institut für Technologie KIT, D-76021 Karlsruhe
Low dimension effects are attracting more interest as they are becoming more relevant for future applications. In particular ultra thin Ni or Fe films are suitable model systems for nanostructured magnetic devices.
Using angle-resolved photoelectron spectroscopy (ARPES) we measured quantum well states/resonances in the close vicinity to the Fermi energy along high symmetry directions and the Fermi surface of the Fe/W(110) and Ni/W(110) films. In Fe/W(110) we find minority quantum well states, which are highly anisotropic in their dispersion due to the rather weak structural anisotropy of the bcc (110) crystal surface. Due to hybridisation effects of the measured quantum well states in Ni/W(110), the origin of the apparent splitting remains to be discussed.