Multiferroic FeTe${}_2$O${}_5$Br: Alternating spin chains with frustrated interchain interactions

Abstract

A combination of density functional theory calculations, many-body model considerations, magnetization and electron spin resonance measurements shows that the multiferroic FeTe${}_2$O${}_5$Br 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 models. 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.

7 pages, 6 figures

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Cited by in corpus (7)

• Spin-stripe phase in a frustrated zigzag spin-1/2 chain
• Investigation of infrared phonon modes in multiferroic single-crystal FeTe${}_2$O${}_5$Br
• Persistent spin dynamics intrinsic to amplitude-modulated long-range magnetic order
• Multiferroicity in the geometrically frustrated FeTe2O5Cl
• Role of Te in the low dimensional multiferroic material FeTe2O5Br
• Frustrated antiferromagnetic spin chains of edge-sharing tetrahedra in volcanic minerals K3Cu3(Fe0.82Al0.18)O2(SO4)4 and K4Cu4O2(SO4)4MeCl
• Evolution of magnetic and crystal structures in the multiferroic FeTe2O5Br