Inelastic scattering of light by a dynamic domain wall
Demokritov S. O. , Kirilyuk A. I., Kreines N. M., Kudinov V. I. , Smirnov V. B., Chetkin M. V.
The inelastic light scattering by a moving domain wall has been detected for the first time by using the method of (Mandelstam-) Brillouin spectroscopy. The scattering spectra show that the velocity of the domain wall depends on the pulsed magnetic field. As the domain-wall velocity approaches the sound velocity, the intensity of the scattered light increases sharply as a result of the emission of phonons by the domain wall. Regions of time-varying motion, in which the scattering spectra are complex in nature, have been detected.