A polarised neutron scattering study of the magnetic correlations in the kagome antiferromagnet AFe(3)(SO4)(2)(OD)(6) (A = D3O, K)
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.Full text not available from this repository.
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|
|Number of Pages:||3|
|Page Range:||pp. 142-144|
|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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