Berlin 2015 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 49: POSTER II
MA 49.15: Poster
Donnerstag, 19. März 2015, 15:00–18:00, Poster A
Sherman mapping of Fe(001)-p(1x1)-O: exchange vs. spin-orbit interaction — •Christian Thiede1, Christian Langenkämper1, Anke B. Schmidt1, Stephan Borek2, Jürgen Braun2, Jan Minár2, Hubert Ebert2, and Markus Donath1 — 1Physikalisches Institut, Universität Münster, Germany — 2Ludwig-Maximilians-Universität München, Germany
A recent development in spin-polarimeter design is the introduction of a spin-polarizing electron mirror which permits multichannel spin-polarization analysis. An electron beam specularly reflected from high Z-targets such as W(001) carries spin information due to spin-orbit interaction.[1] The use of a ferromagnetic target such as Fe(001)-p(1x1)-O provides a high figure of merit [2], easy access to spin information and opens the way for multichannel analysis for two transverse spin-polarization directions in one set-up. For the spin component parallel to the scattering plane, the asymmetry is entirely caused by exchange interaction. Large reflectivity and figure of merit were found [3]. For the spin component perpendicular to the scattering plane, the asymmetry is additionally influenced by spin-orbit interaction.
We present reflectivity and Sherman maps for the latter scattering geometry in comparison with data for the other. We discuss the data in the context of theoretical predictions based on ab initio calculations.
[1] Kolbe et al., Phys. Rev. Lett. 107, 207601 (2011)
[2] Okuda et al., Rev. Sci. Instrum. 79, 123117 (2008)
[3] Thiede et al., Phys. Rev. Appl. 1, 054003 (2014)