Raman scattering from phonons and magnons in antiferromagnetic Fe3BO6

Raman scattering by phonons and by magnon pairs has been observed in Fe3BO6. Of the predicted 60 Raman-active modes, 39 have been identified and classified according to their symmetries. The two-magnon band shows a strong decrease in intensity with increasing temperature, and almost vanishes close to TN = 508 K. The origin of this effect is attributed to the existence of a nearly dispersionless magnon branch.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/24857/1/0000284.pd