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research article
Multiferroic FeTe2O5Br: Alternating spin chains with frustrated interchain interactions
2012
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.
Type
research article
Web of Science ID
WOS:000306991600004
Authors
Pregelj, M.
•
Jeschke, H. O.
•
Feldner, H.
•
Valenti, R.
•
Honecker, A.
•
Saha-Dasgupta, T.
•
Das, H.
•
Yoshii, S.
•
Morioka, T.
•
Nojiri, H.
Publication date
2012
Publisher
Published in
Volume
86
Issue
5
Article Number
054402
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
February 27, 2013
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