Abstract
Inelastic-neutron-scattering studies show triple degeneracy of the exciton along [111] and double degeneracy along [100] with a band-structure-related softening of the longitudinal branch at . The and transitions decrease with increasing pressure suggesting the occurrence of a pressure-induced soft-mode magnetic transition.
- Received 21 July 1977
DOI:https://doi.org/10.1103/PhysRevLett.39.1028
©1977 American Physical Society