Journal Article

FZJ-2018-07519

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Competition of Dzyaloshinskii-Moriya and Higher-Order Exchange Interactions in Rh/Fe Atomic Bilayers on Ir(111)

Romming, N. ; Pralow, H. ; Kubetzka, A. ; Hoffmann, M.FZJ* ; von Malottki, S. ; Meyer, S. ; Dupé, B. ; Wiesendanger, R. ; von Bergmann, K. (Corresponding author) ; Heinze, S.

2018
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/20962  doi:10.1103/PhysRevLett.120.207201

Abstract: 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.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IAS-1)
2. Quanten-Theorie der Materialien (PGI-1)
3. JARA-FIT (JARA-FIT)
4. JARA - HPC (JARA-HPC)

Research Program(s):

1. 142 - Controlling Spin-Based Phenomena (POF3-142) (POF3-142)
2. 143 - Controlling Configuration-Based Phenomena (POF3-143) (POF3-143)

Appears in the scientific report 2018

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Database coverage:
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