Observation of quasi-elastic light scattering in BiFeO${}_3$

We observed quasi-elastic light scattering (QELS) in BiFeO${}_3$ using Raman spectroscopy over a temperature range of 300-860 K. The QELS has two components: a narrow and broad component. The temperature dependence of the intensity and linewidth of the broad component differed below and beyond the Néel point, and the broad QELS may have a magnetic origin.