TY - JOUR
T1 - Fincher-Burke excitations in single-Q chromium
AU - Böni, P.
AU - Clementyev, E.
AU - Stadler, Ch
AU - Roessli, B.
AU - Shirane, G.
AU - Werner, S. A.
PY - 2002/12
Y1 - 2002/12
N2 - 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 of 4 meV < E < 8 meV.
AB - 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 of 4 meV < E < 8 meV.
UR - http://www.scopus.com/inward/record.url?scp=18744418001&partnerID=8YFLogxK
U2 - 10.1007/s003390201625
DO - 10.1007/s003390201625
M3 - Article
AN - SCOPUS:18744418001
SN - 0947-8396
VL - 74
SP - S716-S718
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - SUPPL.I
ER -