Domain wall spin dynamics in kagome antiferromagnets

Lhotel, E. et al. (2011) Domain wall spin dynamics in kagome antiferromagnets. Physical Review Letters, 107(25), p. 257205. (doi: 10.1103/PhysRevLett.107.257205)

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We report magnetization and neutron scattering measurements down to 60 mK on a new family of Fe based kagome antiferromagnets, in which a strong local spin anisotropy combined with a low exchange path network connectivity lead to domain walls intersecting the kagome planes through strings of free spins. These produce unfamiliar slow spin dynamics in the ordered phase, evolving from exchange released spin flips towards a cooperative behavior on decreasing the temperature, probably due to the onset of long-range dipolar interaction. A domain structure of independent magnetic grains is obtained that could be generic to other frustrated magnets.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Price, Dr Daniel
Authors: Lhotel, E., Simonet, V., Ortloff, J., Canals, B., Paulsen, C., Suard, E., Hanson, T., Price, D.J., Wood, P.T., Powell, A.K., and Ballou, R.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN (Online):1079-7114

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