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), SEP 21-23, 1998, INST LAUE LANGEVIN, CHADWICK AMPHITHEATER, GRENOBLE, FRANCE.

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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)
Subjects:	Q Science > QC Physics
Journal or Publication Title:	PHYSICA B-CONDENSED MATTER
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0921-4526
Date:	June 1999
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
URI:	http://wrap.warwick.ac.uk/id/eprint/14569

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