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Phys. Rev. B 64, 094436 (2001) [8 pages]

Short-range order in the topological spin glass (D3O)Fe3(SO4)2(OD)6 using xyz polarized neutron diffraction

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A. S. Wills1,*, G. S. Oakley2, D. Visser3,4,5, J. Frunzke2,†, A. Harrison2, and K. H. Andersen3
1Département de Recherche Fondamentale sur la Matière Condensée, SPSMS, CEA Grenoble, 38054 Grenoble, France
2Department of Chemistry, The University of Edinburgh, The King’s Buildings, West Mains Road, Edinburgh EH9 3JJ, United Kingdom
3NWO-EW, ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, United Kingdom
4Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
5IRI, Tu-Delft, Metelweg 15, 2629JB Delft, The Netherlands

Received 22 November 2000; published 15 August 2001

We use polarized xyz neutron diffraction to examine the nature of the freezing transition to an unconventional topological spin-glass state in the S=5/2 kagomé antiferromagnet (D3O)Fe3(SO4)2(OD)6. Measurements of the total magnetic scattering cross-section, S(Q), were taken in the momentum-transfer range 0.5<~Q<~2.5 Å-1 between the temperatures 1.5 and 250 K. The observation of two-dimensional correlations at 250 K, i.e., in excess of 14 times the freezing temperature, is in agreement with predictions of an anisotropy-induced spin-glass freezing transition in an ordered kagomé antiferromagnet.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.64.094436
DOI:
10.1103/PhysRevB.64.094436
PACS:
75.50.Lk, 75.50.Ee

*Present address: Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, 38042 Grenoble Cedex 9, France.

†Present address: Universität Kaiserslautern, Fachbereich Chemie, 67663 Kaiserlautern, Germany.

 
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