Multiferroic FeTe 2O 5Br: Alternating spin chains with frustrated interchain interactions

M. Pregelj, Harald Olaf Jeschke, H. Feldner, R. Valentí, A. Honecker, T. Saha-Dasgupta, H. Das, S. Yoshii, T. Morioka, H. Nojiri, H. Berger, A. Zorko, O. Zaharko, D. Arčon

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

A combination of density functional theory calculations, many-body model considerations, and magnetization and electron-spin-resonance measurements shows that the multiferroic FeTe 2O 5Br 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.

Original languageEnglish
Article number054402
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number5
DOIs
Publication statusPublished - Aug 1 2012
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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