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O: Fachverband Oberflächenphysik
O 51: Surface Magnetism
O 51.5: Vortrag
Mittwoch, 29. März 2023, 12:30–12:45, REC C 213
Magnetic circular dichroism of oxygen-passivated and bare Fe(100) in threshold PEEM — •David Huber1, Friederike Wührl1, Maximilian Paleschke1,2, Frank Schumann3, Stefan Förster1, and Wolf Widdra1 — 1Institute of Physics, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), Germany — 2Institute of Atomic and Molecular Sciences (IAMS), Academia Sinica, Taipei, Taiwan — 3Max Planck Institute of Microstructure Physics, Halle (Saale), Germany
Magnetic circular dichroism (MCD) in threshold PEEM enables imaging of in-plane and out-of-plane oriented ferromagnetic domains in real and momentum space [1, 2]. Here, we compare PEEM and ARPES data for Fe(100) and the oxygen-passivated Fe(100)-(1×1)-O. Imaging the in-plane domains we observe four different asymmetry levels, which we assign to the four magnetization vectors pointing in the high symmetry directions. The observed asymmetry values vary from 3% up to 5,5% comparing Fe(100)-(1×1)-O and Fe(100). The domain-specific momentum space measurements on Fe(100) are thereby in good agreement with relativistic photoemission calculations [2]. Through off-normal photoemission we increase the sensitivity of the method by one order of magnitude in comparison to previous reports [1].
[1] Marx et al., PRL 84, 5888 (2000).
[2] Henk and Johansson, J. Electr. Spectr. Relat. Phenom. 94, 259 (1998).