Journal Article

PUBDB-2021-00849

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Revealing noncollinear magnetic ordering at the atomic scale via XMCD

Kielgast, F. (Corresponding author)Extern*CFEL* ; Baev, I.CFEL*Extern* ; Beeck, T.Extern* ; Pressacco, F.CFEL*Extern*DESY* ; Martins, M.CFEL*Extern*

2021
Macmillan Publishers Limited, part of Springer Nature [London]

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Please use a persistent id in citations: doi:10.1038/s41598-021-82518-4  doi:10.3204/PUBDB-2021-00849

Abstract: Mass-selected V and Fe monomers, as well as the heterodimer Fe1V1, were deposited on a Cu(001) surface. Their electronic and magnetic properties were investigated via X-ray absorption (XAS) and X-ray magnetic circular dichroism (XMCD) spectroscopy. Anisotropies in the magnetic moments of the deposited species could be examined by means of angle resolving XMCD, i.e. changing the X-ray angle of incidence. A weak adatom-substrate-coupling was found for both elements and, using group theoretical arguments, the ground state symmetries of the adatoms were determined. For the dimer, a switching from antiparallel to parallel orientation of the respective magnetic moments was observed. We show that this is due to the existence of a noncollinear spin-flop phase in the deposited dimers, which could be observed for the first time in such a small system. Making use of the two magnetic sublattices model, we were able to find the relative orientations for the dimer magnetic moments for different incidence angles.

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Contributing Institute(s):

1. Uni Hamburg / Experimentalphysik (UNI/EXP)
2. Laser Forschung und Entwicklung (FS-LA)
3. FS-FLASH (CFEL-UDSS)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P04 (PETRA III)

Appears in the scientific report 2021

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