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Magnetic frustration in an iron-based Cairo pentagonal lattice
Ressouche, Eric (Commissariat à l'énergie atomique et aux énergies alternatives. Service de Physique Statistique, Magnétisme et Supraconductivité)
Simonet, V. (Institut Néel (Grenoble, França))
Canals, B. (Institut Néel (Grenoble, França))
Gospodinov, M. (Bulgarian Academy of Sciences. Institute of Solid State Physics)
Skumryev, Vassil (Universitat Autònoma de Barcelona. Departament de Física)
American Physical Society

Data: 2009
Resum: 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.
Drets: Tots els drets reservats.
Llengua: Anglès
Document: article ; publishedVersion
Publicat a: Physical review letters, Vol. 103, Issue 26 (December 2009) , p. 267204, ISSN 0031-9007

DOI: 10.1103/PhysRevLett.103.267204

4 p, 1.0 MB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Grup de nanoenginyeria de materials, nanomagnetisme i nanomecànica (Gnm3)
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