Magnetic frustration in an iron-based Cairo pentagonal lattice

Magnetic frustration in an iron-based Cairo pentagonal lattice

The Fe3+ lattice in the Bi2Fe4O9 compound is found to materialize the first analogue of a magnetic pentagonal lattice. Because of its odd number of bonds per elemental brick, this lattice, subject to first neighbor antiferromagnetic interactions, is prone to geometric frustration. The Bi2Fe4O9 magne...

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Veröffentlicht in:Physical review letters 2009-12, Vol.103 (26), p.267204-267204, Article 267204
Hauptverfasser: Ressouche, E, Simonet, V, Canals, B, Gospodinov, M, Skumryev, V
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Condensed Matter
Physics
Strongly Correlated Electrons
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creator Ressouche, E
Simonet, V
Canals, B
Gospodinov, M
Skumryev, V
description The Fe3+ lattice in the Bi2Fe4O9 compound is found to materialize the first analogue of a magnetic pentagonal lattice. Because of its odd number of bonds per elemental brick, this lattice, subject to first neighbor antiferromagnetic interactions, is prone to geometric frustration. The Bi2Fe4O9 magnetic properties have been investigated by macroscopic magnetic measurements and neutron diffraction. The observed noncollinear magnetic arrangement is related to the one stabilized on a perfect tiling as obtained from a mean field analysis with direct space magnetic configuration calculations. The peculiarity of this structure arises from the complex connectivity of the pentagonal lattice, a novel feature compared to the well-known case of triangle-based lattices.
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Strongly Correlated Electrons
title Magnetic frustration in an iron-based Cairo pentagonal lattice
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