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A polarised neutron scattering study of the magnetic correlations in the kagome antiferromagnet AFe(3)(SO4)(2)(OD)(6) (A = D3O, K)
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UNSPECIFIED (1999) A polarised neutron scattering study of the magnetic correlations in the kagome antiferromagnet AFe(3)(SO4)(2)(OD)(6) (A = D3O, K). In: 2nd Workshop on Polarised Neutrons for Condensed Matter Investigations (PNCMI'98), INST LAUE LANGEVIN, CHADWICK AMPHITHEATER, GRENOBLE, FRANCE, SEP 21-23, 1998. Published in: PHYSICA B-CONDENSED MATTER, 267 pp. 142-144. ISSN 0921-4526.
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Abstract
This paper reports a full three-directional (XYZ) polarisation analysis study of the short- and long-range order in D3OFe3(SO4)(2)(OD)(6) and KFe3(SO4)(2)(OD)(6) performed on the D7 Diffractometer at the ILL. Both compounds belong to the jarosite family of minerals. The Fe3+ ions in these materials are arranged in a two-dimensional kagome lattice which exhibits, in the case of antiferromagnetic superexchange, a strong geometric frustration. Only short-range magnetic correlations down to 1.5 K have been observed in the D3O salt, in contrast to the successive long-range magnetic ordering transitions seen in the K salt at T-N1 approximate to 65 K and T-N2 approximate to 50 K, respectively. The diffuse scattering observed in the deuteronium salt is compared with the theoretical predictions for the magnetic structure factor for a kagome lattice with the nearest-neighbour antiferromagnetic exchange. (C) 1999 Elsevier Science B.V. All rights reserved.
Item Type: | Conference Item (UNSPECIFIED) | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | PHYSICA B-CONDENSED MATTER | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0921-4526 | ||||
Official Date: | June 1999 | ||||
Dates: |
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Volume: | 267 | ||||
Number of Pages: | 3 | ||||
Page Range: | pp. 142-144 | ||||
Publication Status: | Published | ||||
Title of Event: | 2nd Workshop on Polarised Neutrons for Condensed Matter Investigations (PNCMI'98) | ||||
Location of Event: | INST LAUE LANGEVIN, CHADWICK AMPHITHEATER, GRENOBLE, FRANCE | ||||
Date(s) of Event: | SEP 21-23, 1998 |
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