Abstract
Neutron-scattering measurements have been performed on nickel to obtain more information about ,the generalized susceptibility. Evidence of an optical mode that crosses the main [100] spin-wave branch was found in agreement with predictions based on the intinerant-electron band-theory approach. No optical mode was found for the [111] direction; however, the dispersion curve is found to deviate from a quadratic dispersion law.
- Received 17 October 1979
DOI:https://doi.org/10.1103/PhysRevLett.43.2029
©1979 American Physical Society