Document type:
Zeitschriftenaufsatz
Author(s):
B̈oni, P.; Clementyev, E.; Stadler, C.; Roessli, B.; Shirane, G.; Werner, S.A.
Title:
Fincher\textendash{{Burke}} Excitations in Single-{{Q}} Chromium
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$<$9 meV. In agreement with previous measurements we observe Fincher\textendash{}Burke excitations in the transverse spin density wave phase that appear between the unresolved spin-wave peaks at the incommensurate positions Q$\pm$=(1$\pm\delta$,0,0). In contrast to the previous measurements, our high-resolution data shows that the Fincher\textendash{}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
Keywords:
PACS: 75.30.Fv; 75.50.Ee; 75.40.Gb; 75.30.Ds
Journal title:
Applied Physics A
Year:
2002
Journal volume:
74
Month:
dec
Journal issue:
Pages contribution:
s716
Language:
en
Fulltext / DOI:
Print-ISSN:
1432-0630