%0 Journal Article
%A Krönlein, Andreas
%A Schmitt, Martin
%A Hoffmann, Markus
%A Kemmer, Jeannette
%A Seubert, Nicolai
%A Vogt, Matthias
%A Küspert, Julia
%A Böhme, Markus
%A Alonazi, Bandar
%A Kügel, Jens
%A Albrithen, Hamad A.
%A Bode, Matthias
%A Bihlmayer, Gustav
%A Blügel, Stefan
%T Magnetic Ground State Stabilized by Three-Site Interactions: Fe / Rh ( 111 )
%J Physical review letters
%V 120
%N 20
%@ 1079-7114
%C College Park, Md.
%I APS
%M FZJ-2018-02972
%P 207202
%D 2018
%X We report the direct observation of a theoretically predicted magnetic ground state in a monolayer Fe on Rh(111), which is referred to as an up-up-down-down (↑↑↓↓) double-row-wise antiferromagnetic spin structure, using spin-polarized scanning tunneling microscopy. This exotic phase, which exists in three orientational domains, is revealed by experiments with magnetic probe tips performed in external magnetic fields. It is shown that a hitherto unconsidered four-spin–three-site beyond-Heisenberg interaction distinctly contributes to the spin coupling of atoms with S≥1 spins. The observation of the ↑↑↓↓ order substantiates the presence of higher-order, in particular, three-site interactions, in thin magnetic films of itinerant magnets.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:29864328
%U <Go to ISI:>//WOS:000432992600007
%R 10.1103/PhysRevLett.120.207202
%U https://juser.fz-juelich.de/record/845763