Dresden 2011 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)

O 36.112: Poster

Dienstag, 15. März 2011, 18:30–22:00, P4

NMR of buried interfaces — •Anuschka Schmitt, Matthias Buschmann, Richard Kastelik, Alexander Potzuweit, and Heinz Jänsch — Fachbereich Physik, Philipps-Universität Marburg, D-35032 Marburg

We employ Xe-NMR to investigate surface phenomena by adsorbing hyperpolarized ¹²⁹Xe onto a helium-cooled single crystal and studying the electronic interactions of substrate and adsorbate. The high nuclear spin polarization of the adsorbed Xe-film could be transferred to buried interfaces within the substrate (which then would be accessible for further NMR experiments) via dipolar distant-field transfer. Such a transfer can be achieved by applying two rf-frequencies at the same time using a double resonant probe, integrated into an UHV system. Furthermore, an inhomogeneous magnetic structure of the Xe-film is needed, which could be provided by a geometrically structured sample in the µm range. Here, we present the development of the double resonant probe and first experiments.