Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 65: Poster 2
MA 65.13: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-OG1
Element specific magnetometry of buried layers by HAXPES — •Andrei Gloskovskii1, Gerhard H. Fecher2, and Wolfgang Drube1 — 1Deutsches Elektronen-Synchrotron DESY, Hamburg — 2Max Planck Institute for Chemical Physics of Solids, Dresden
The electronic properties of buried magnetic nano-layers were studied using the linear magnetic dichroism (LMD) in the angular distribution of photoemitted Fe, Co, and Mn 2p electrons from a CoFe-IrMn multi-layered sample. The buried layers were probed using hard X-ray photoelectron spectroscopy, HAXPES, at the undulator beamline P09 of the 3rd generation storage ring PETRA III.
In general, the intensity and shape of photoelectron lines of magnetic materials depend on the relative orientation of the sample magnetisation, the X-ray beam polarisation and the spectrometer axis, i.e. the electron emission direction. The highest LMD value was obtained for the Fe 2p3/2 line measured with the polarisation vector E→ ∥ M→ versus E→ ⊥ M→. The dichroism value obtained for Fe 2p3/2 is 5.5%, for Co 2p3/2 it is 4.5%.
It is demonstrated that magnetic dichroism and spin-resolved HAXPES is an effective and powerful technique to perform element specific magnetometry of deeply buried ferromagnetic and antiferromagnetic magnetic materials and multilayered spintronics devices, which are inaccessible with conventional soft X-ray photoelectron spectroscopy. It allows to determine the relative orientation of the magnetisation in different layers in a complex nano-structured sample.