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Title: Spin Waves in the Frustrated Kagome Lattice Antiferromagnet KFe 3(OH) 6(SO 4) 2

Abstract

The spin wave excitations of the S=5/2 kagome lattice antiferromagnet KFe{sub 3}(OH){sub 6}(SO{sub 4}){sub 2} have been measured using high-resolution inelastic neutron scattering. We directly observe a flat mode which corresponds to a lifted ''zero energy mode,'' verifying a fundamental prediction for the kagome lattice. A simple Heisenberg spin Hamiltonian provides an excellent fit to our spin wave data. The antisymmetric Dzyaloshinskii-Moriya interaction is the primary source of anisotropy and explains the low-temperature magnetization and spin structure.

Authors:
 [1];  [1];  [1];  [2];  [3];  [2];  [4];  [1]
  1. Massachusetts Institute of Technology (MIT)
  2. National Institute of Standards and Technology (NIST)
  3. University of Pennsylvania
  4. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); High Flux Isotope Reactor
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
978148
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 24
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANISOTROPY; FORECASTING; HAMILTONIANS; MAGNETIZATION; NEUTRONS; SCATTERING; SPIN; SPIN WAVES

Citation Formats

Matan, K., Grohol, D., Nocera, D. G., Yildirim, T., Harris, A. B., Lee, S.-H., Nagler, Stephen E, and Lee, Y. S.. Spin Waves in the Frustrated Kagome Lattice Antiferromagnet KFe3(OH)6(SO4)2. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.96.247201.
Matan, K., Grohol, D., Nocera, D. G., Yildirim, T., Harris, A. B., Lee, S.-H., Nagler, Stephen E, & Lee, Y. S.. Spin Waves in the Frustrated Kagome Lattice Antiferromagnet KFe3(OH)6(SO4)2. United States. doi:10.1103/PhysRevLett.96.247201.
Matan, K., Grohol, D., Nocera, D. G., Yildirim, T., Harris, A. B., Lee, S.-H., Nagler, Stephen E, and Lee, Y. S.. Sun . "Spin Waves in the Frustrated Kagome Lattice Antiferromagnet KFe3(OH)6(SO4)2". United States. doi:10.1103/PhysRevLett.96.247201.
@article{osti_978148,
title = {Spin Waves in the Frustrated Kagome Lattice Antiferromagnet KFe3(OH)6(SO4)2},
author = {Matan, K. and Grohol, D. and Nocera, D. G. and Yildirim, T. and Harris, A. B. and Lee, S.-H. and Nagler, Stephen E and Lee, Y. S.},
abstractNote = {The spin wave excitations of the S=5/2 kagome lattice antiferromagnet KFe{sub 3}(OH){sub 6}(SO{sub 4}){sub 2} have been measured using high-resolution inelastic neutron scattering. We directly observe a flat mode which corresponds to a lifted ''zero energy mode,'' verifying a fundamental prediction for the kagome lattice. A simple Heisenberg spin Hamiltonian provides an excellent fit to our spin wave data. The antisymmetric Dzyaloshinskii-Moriya interaction is the primary source of anisotropy and explains the low-temperature magnetization and spin structure.},
doi = {10.1103/PhysRevLett.96.247201},
journal = {Physical Review Letters},
number = 24,
volume = 96,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}