Journal
PHYSICAL REVIEW B
Volume 86, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.86.054402
Keywords
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Funding
- Swiss National Science Foundation [200021-129899]
- DFG [SFB/TR 49, HO 2325/4-2]
- Helmholtz Association [HA216/EMMI]
- Slovenian research agency [J1-2118]
- GCOE
- Kakenhi from MEXT Japan
- Swiss National Science Foundation (SNF) [200021_129899] Funding Source: Swiss National Science Foundation (SNF)
- Grants-in-Aid for Scientific Research [23224009] Funding Source: KAKEN
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A combination of density functional theory calculations, many-body model considerations, and magnetization and electron-spin-resonance measurements shows that the multiferroic FeTe2O5Br should be described as a system of alternating antiferromagnetic S = 5/2 chains with strong Fe-O-Te-O-Fe bridges weakly coupled by two-dimensional frustrated interactions, rather than the previously reported tetramer model. The peculiar temperature dependence of the incommensurate magnetic vector can be explained in terms of interchain exchange striction being responsible for the emergent net electric polarization.
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