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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