RAMAN-SCATTERING STUDY OF LUFEO3

The zone-center magnon modes of LuFeO3 have been studied by first-order Raman scattering. At room temperature, the two magnon modes (M 1 and M2) associated with the canted, antiferromagnetically ordered Fe3+ moments are seen at 18.5 and 22 cm-1, respectively. Their corresponding symmetries, determined through polarization measurements on single crystals, are consistent with the magnetic point group (m′m′m) of the crystal. The distinct scattering observed from phonons is also discussed in the context of the dependence of the phonon spectra on the mass of the rare-earth atom. © 1990 American Institute of Physics.