Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 63: Posters: Scanning Probe Methods

O 63.10: Poster

Mittwoch, 2. April 2014, 17:30–21:00, P2

Detecting the topographic, chemical and magnetic contrast at surfaces with nanometer spatial resolution — •Danilo Andrea Zanin, Mehmet Erbudak, Lorenzo G. De Pietro, Hugo Cabrera, Andreas Fognini, Thomas Michlmayr, Yves M. Acremann, Alessandro Vindigni, Danilo Pescia, and Urs Ramsperger — ETH Zurich, Switzerland

For many decades the development and investigation of magnetic nanostructured materials has been motivated by the quest for novel paradigms for magnetostorage and spintronics. The possibility of resolving magnetic-textures in real space with increasing spatial resolution has, indeed, always opened novel applicative and fundamental perspectives. Scanning-Electron-Microscopy with Polarization Analysis (SEMPA), e.g., made it possible to directly observe the re-entrant transitions of magnetic-domain patterns in thin films of Fe on Cu(001). Inspired by the Russel Young topografiner we redesigned the SEMPA setup, by replacing the primary electron beam source and the probing method. We dubbed this new technique Near Field-Emission Scanning Electron Microscopy (NFESEM). Currently, NFESEM technique is capable to resolve the topography of metals and semiconductors with nanometer lateral resolution and detect the entire spectrum of SE induced by a low-energy primary electron beam. We report on promising results of single-energy surface imaging, which confirm the technical feasibility of electron spectroscopy and magnetic-domain mapping with a nanometer spatial resolution.