Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Poster I
MA 19.26: Poster
Dienstag, 1. April 2014, 13:00–15:30, P1
Spin-dependent reflection and absorption maps of Fe(001)-p(1x1)-O — •Christian Langenkämper1, Christian Thiede1, Kaito Shirai2, Anke B. Schmidt1, Taichi Okuda3, Stephan Borek4, Jan Minár4, Jürgen Braun4, Hubert Ebert4, and Markus Donath1 — 1Physikalisches Institut, Universität Münster, Germany — 2Graduate School of Science, Hiroshima University, Japan — 3Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan — 4Ludwig-Maximilians-Universität München, Germany
Today, the most efficient spin-polarization detectors are based on low-energy scattering from oxygen-passivated Fe(001) targets. They combine long-term stability with a high figure of merit [1,2]. The working points have been described at the spin asymmetry maxima at energies between 6 eV and 13.5 eV and scattering angles between 12 and 15 degrees. We performed reflection and absorption measurements for Fe(001)-p(1x1)-O over a wide range of scattering angles and energies. We compare spin-asymmetry maps for absorption and reflection with theoretical data in view of application in spin-polarization detectors.
[1] Winkelmann et al., Rev. Sci. Instrum. 79, 083303 (2008)
[2] Okuda et al., Rev. Sci. Instrum. 79, 123117 (2008)