Dynamics of paramagnetic chromium alloys

Despite the absence of a static spin-density wave (SDW), the cross section of paramagnetic chromium alloys still peaks near the wavevectors of the SDW in pure chromium. An analysis of the paramagnetic fluctuations in doped chromium reveals that the cross section vanishes at zero temperature and zero frequency, in agreement with recent experiments by Fawcett et al. The authors also predict that the peak elastic cross section will reach a maximum at a temperature which increases with the impurity concentration and that impurity scattering will eventually broaden the sidepeaks into a single central peak.