Three-dimensional spin fluctuations in Na0.75CoO2.

@article{Helme2005ThreedimensionalSF,
  title={Three-dimensional spin fluctuations in Na0.75CoO2.},
  author={L. Helme and A. Boothroyd and R. Coldea and D. Prabhakaran and D. Tennant and A. Hiess and J. Kulda},
  journal={Physical review letters},
  year={2005},
  volume={94 15},
  pages={
          157206
        }
}
  • L. Helme, A. Boothroyd, +4 authors J. Kulda
  • Published 2005
  • Physics, Medicine
  • Physical review letters
  • We report polarized- and unpolarized-neutron scattering measurements of magnetic excitations in single-crystal Na0.75CoO2. The data confirm ferromagnetic correlations within the cobalt layers and reveal antiferromagnetic correlations perpendicular to the layers, consistent with an A-type antiferromagnetic ordering. The magnetic modes propagating perpendicular to the layers are sharp, and reach a maximum energy of approximately 12 meV. From a minimal spin-wave model, containing only nearest… CONTINUE READING
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