Abstract
We investigate the one-magnon Raman scattering in the layered antiferromagnetic compound. We find that the Raman signal is composed by two one-magnon peaks: one in the channel, corresponding to the Dzyaloshinskii-Moryia mode, and another in the channel, corresponding to the mode. Furthermore, we show that a peak corresponding to the mode can be induced in the planar geometry when a magnetic field is applied along the easy axis for the sublattice magnetization. The appearance of such a field-induced mode signals the existence of a magnetic state above the Néel temperature , where the direction of the weak-ferromagnetic moment lies within the planes.
- Received 6 July 2005
DOI:https://doi.org/10.1103/PhysRevB.72.140401
©2005 American Physical Society