TY  - JOUR
AU  - Romming, Niklas
AU  - Pralow, Henning
AU  - Kubetzka, André
AU  - Hoffmann, Markus
AU  - von Malottki, Stephan
AU  - Meyer, Sebastian
AU  - Dupé, Bertrand
AU  - Wiesendanger, Roland
AU  - von Bergmann, Kirsten
AU  - Heinze, Stefan
TI  - Competition of Dzyaloshinskii-Moriya and Higher-Order Exchange Interactions in Rh/Fe Atomic Bilayers on Ir(111)
JO  - Physical review letters
VL  - 120
IS  - 20
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2018-07519
SP  - 207201
PY  - 2018
AB  - Using spin-polarized scanning tunneling microscopy and density functional theory we demonstrate the occurrence of a novel type of noncollinear spin structure in Rh/Fe atomic bilayers on Ir(111). We find that higher-order exchange interactions depend sensitively on the stacking sequence. For fcc-Rh/Fe/Ir(111), frustrated exchange interactions are dominant and lead to the formation of a spin spiral ground state with a period of about 1.5 nm. For hcp-Rh/Fe/Ir(111), higher-order exchange interactions favor an up-up-down-down (↑↑↓↓) state. However, the Dzyaloshinskii-Moriya interaction at the Fe/Ir interface leads to a small angle of about 4° between adjacent magnetic moments resulting in a canted ↑↑↓↓ ground state.
LB  - PUB:(DE-HGF)16
C6  - pmid:29864327
UR  - <Go to ISI:>//WOS:000432992600006
DO  - DOI:10.1103/PhysRevLett.120.207201
UR  - https://juser.fz-juelich.de/record/858674
ER  -