Quasielastic Light Scattering in the Broadband Brillouin Spectra of Relaxor Ferroelectric PbMgNbO.

In this paper, the behavior of quasielastic light scattering (QELS) in a PbMgNbO (PMN) crystal under broadband Brillouin light scattering in a temperature range from 750 K to 80 K was studied. It was shown that QELS consists of two components: narrow (0.9 GHz to 11 GHz) and wide (80 GHz to 600 GHz).