New Magnetic Excitations in the Spin-Density-Wave of Chromium
arXiv:cond-mat/0208084 · doi:10.1103/PhysRevB.67.064423
Abstract
Low-energy magnetic excitations of chromium have been reinvestigated with a single-Q crystal using neutron scattering technique. In the transverse spin-density-wave phase a new type of well-defined magnetic excitation is found around (0,0,1) with a weak dispersion perpendicular to the wavevector of the incommensurate structure. The magnetic excitation has an energy gap of E ~ 4 meV and at (0,0,1) exactly corresponds to the Fincher mode previously studied only along the incommensurate wavevector.
4 pages, 4 figures