Neutron spin echo study of magnetic fluctuations in the kagome antiferromagnet (D3O)Fe-3(SO4)(2)(OD)(6)
UNSPECIFIED (1999) Neutron spin echo study of magnetic fluctuations in the kagome antiferromagnet (D3O)Fe-3(SO4)(2)(OD)(6). 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.
The kagome lattice with antiferromagnetic nearest-neighbour exchange provides a simple example of a geometrically frustrated magnet with a highly degenerate ground state. Theoretical work indicates that the static and dynamic correlations of this magnet are unconventional, with strong fluctuations down to very low temperatures. Deuteronium Jarosite ((D3O)Fe-3(SO4)(2)(OD)(6)) provides a rare example of a suitable model material to test such theory. DC susceptibility studies show strong antiferromagnetic exchange between the S = 5/2 moments (theta(CW) congruent to - 700 K), and a spin-glass transition at T-f congruent to 13 K. We report on neutron spin-echo measurements made on this compound using the polarised neutron spectrometer IN11 at ILL taken with momentum transfer Q = 1.35 Angstrom(-1) for times ranging from 9.7 to 870 ps. The magnetic fluctuations were observed to slow down gradually on cooling through T-f, until they appeared to be static at the shortest experimental timescale at 1.5 K. (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:||4|
|Page Range:||pp. 145-148|
|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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