%0 Journal Article
%A Kielgast, Fridtjof
%A Baev, Ivan
%A Beeck, Torben
%A Pressacco, Federico
%A Martins, Michael
%T Revealing noncollinear magnetic ordering at the atomic scale via XMCD
%J Scientific reports
%V 11
%N 1
%@ 2045-2322
%C [London]
%I Macmillan Publishers Limited, part of Springer Nature
%M PUBDB-2021-00849
%P 2996
%D 2021
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:33542346
%U <Go to ISI:>//WOS:000618048400013
%R 10.1038/s41598-021-82518-4
%U https://bib-pubdb1.desy.de/record/454942