Resonant Auger spectromicroscopy in ultrathin Fe films on W(110)

L 3 M 2 , 3 M 2 , 3 Auger transition is measured near the L 3 resonance of ferromagnetic Fe films on W(110). The kinetic energies of the Auger peaks display the typical Raman behaviour for photon energies well below the absorption threshold, where the Auger energy follows the changes in the photon e...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2023-12, Vol.35 (49), p.495801
Main Authors: Cojocariu, I, Jugovac, M, Locatelli, A, Menteş, T O
Format: Article
Language:English
Subjects:
photoemission electron microscopy, XPEEM
resonant Auger spectroscopy
ultrathin film
XMCD
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Summary:L 3 M 2 , 3 M 2 , 3 Auger transition is measured near the L 3 resonance of ferromagnetic Fe films on W(110). The kinetic energies of the Auger peaks display the typical Raman behaviour for photon energies well below the absorption threshold, where the Auger energy follows the changes in the photon energy. Classical Auger behaviour with constant kinetic energy sets in at about 1.5 eV below the L 3 resonance independently from the number of Fe layers down to the monolayer thickness. Strong x-ray circular magnetic dichroism is observed at the L 3 edge in the entire L 3 M 2 , 3 M 2 , 3 Auger spectrum. Different Auger features originating from the final state with two 3p core holes show slight variations in the dichroic signal, which is attributed to the exchange interaction between the core holes and the valence band. Finally, XMCD-PEEM magnetic domain imaging using Auger electrons is demonstrated with a high level of contrast and lateral resolution approaching that of imaging with secondary photoelectrons.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/acf0b0