Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Poster 2
MA 35.40: Poster
Donnerstag, 8. September 2022, 16:00–18:00, P4
Magnetometry of Buried Co-based Nanolayers by Hard X-ray Photoelectron Spectroscopy — •Andrei Gloskovskii1, Christoph Schlueter1, and Gerhard Fecher2 — 1Photon Science / DESY, Hamburg — 2Max Planck Institute for Chemical Physics of Solids, Dresden
The intensity and shape of photoelectron lines of magnetic materials depend on the relative orientation of the sample magnetization, the X-ray beam polarization and the spectrometer axis, i.e. the electron emission direction. In the hard X-ray regime, the beam polarization can be conveniently modified utilizing the phase shift produced by a diamond phase plate in the vicinity of a Laue or Bragg reflection. A single-stage in-vacuum phase retarder is installed and commissioned in 2020 at the HAXPES beamline P22 at PETRA III (Hamburg) [1].
The electronic and magnetic properties of CoFe and Co-based Heusler nanolayers were studied using the linear and circular magnetic dichroism in the angular distribution of photoelectrons. The layers were remanently magnetized in-situ and Co 2p1/2 and 2p3/2 core levels were probed at room temperature [2-3]. Both the polarization-dependent spectra and the dichroism indicate that the lines of the multiplet extend over the entire spectral range. In particular, the dichroism does not vanish between the two main parts of the spin-orbit doublet.
References [1] C. Schlueter et al., AIP conference proceedings 2054(1), 040010 (2019).[2] G.H. Fecher et al., SPIN 04, 1440017 (2014). [3] P. Swekis et al., Nanomaterials 11, 251 (2021).