Abstract.
The low-energy excitations of incommensurate antiferromagnetic Cr have been investigated by means of high-resolution, inelastic neutron scattering with unpolarized, cold neutrons within an energy range E<9 meV. In agreement with previous measurements we observe Fincher–Burke excitations in the transverse spin density wave phase that appear between the unresolved spin-wave peaks at the incommensurate positions Q±=(1±δ,0,0). In contrast to the previous measurements, our high-resolution data shows that the Fincher–Burke modes do not follow a linear dispersion. Therefore, they have nothing in common with the acoustic phonon branch. The major part of the scattering is concentrated in the range 4 meV<E<8 meV.
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Received: 18 July 2001 / Accepted: 11 December 2001
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Böni, P., Clementyev, E., Stadler, C. et al. Fincher–Burke excitations in single-Q chromium . Appl Phys A 74 (Suppl 1), s716–s718 (2002). https://doi.org/10.1007/s003390201625
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DOI: https://doi.org/10.1007/s003390201625