Polarized neutron scattering studies of the kagome lattice antiferromagnet KFe[subscript 3](OH)[subscript 6](SO[subscript 4])[subscript 2]

Author(s)
Grohol, D.; Wakimoto, S.; Kakurai, K.; Matan, Kittiwit; Helton, Joel S.; ... Show more
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Abstract
We report polarized neutron scattering studies of spin-wave excitations and spin fluctuations in the S = 5/2 kagome lattice antiferromagnet KFe[subscript 3](OH)[subscript 6](SO[subscript 4])[subscript 2] (jarosite). Inelastic polarized neutron scattering measurements at 10 K on a single crystal sample reveal two spin gaps, associated with in-plane and out-of-plane excitations. The polarization analysis of quasi-elastic scattering at 67 K shows in-plane spin fluctuations with XY symmetry, consistent with the disappearance of the in-plane gap above the Neel temperature T[subscript N] = 65 K. Our results suggest that jarosite is a promising candidate for studying the 2D XY universality class in magnetic systems.
Date issued
2009-06
URI
http://hdl.handle.net/1721.1/102198
Department
Massachusetts Institute of Technology. Department of Chemistry; Massachusetts Institute of Technology. Department of Physics
Journal
Physica B: Condensed Matter
Publisher
Elsevier
Citation
Matan, K., J.S. Helton, D. Grohol, D.G. Nocera, S. Wakimoto, K. Kakurai, and Y.S. Lee. “Polarized Neutron Scattering Studies of the Kagome Lattice Antiferromagnet KFe[subscript 3](OH)[subscript 6](SO[subscript 4])[subscript 2].” Physica B: Condensed Matter 404, no. 17 (September 2009): 2529–2531.
Version: Author's final manuscript
ISSN
09214526
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