Figure 2
From: Inducing Dzyaloshinskii–Moriya interaction in symmetrical multilayers using post annealing
Results from the Brillouin light scattering spectroscopy. (a–b) The measured BLS spectra of the SWs having wave number of ksw = 20.44 rad/μm in the presence of two different applied field values (\({\mu }_{0}\) H = ± 50 mT) for the as-deposited and annealed samples, respectively. Symbols refer to the experimental data and solid lines are the Lorentzian fits. (c–d) The measured dispersion relation of the SWs including the Stokes (S) and anti-Stokes (AS) peaks for the as-deposited and annealed samples respectively. Symbols and solid lines correspond to the experimental data and linear fits results. (e–f) The frequency difference \(\Delta \) f between the counter-propagating SWs as a function of the wave vector for the as-deposited and annealed samples, respectively.
