Direct observation of the temperature dependence of the Dzyaloshinskii–Moriya interaction

Abstract

Abstract In this work, we investigate the temperature dependence of the Dzyaloshinskii–Moriya interaction (DMI) in Co/Pt thin film by observing the asymmetric spin-wave dispersion using Brillouin light scattering. The DMI constant D reduce monotonously with the temperature increasing from room temperature to 393 K. By extracting the saturation magnetization M s and the uniaxial anisotropy K u, we find that D(T) ∝ K u (T)2.08±0.13 and D(T) ∝ M s (T)5.25±0.33. These observations indicate that temperature is a possible way to control the DMI. On the other hand, the temperature dependence of DMI in thin films may have significant influence for potential applications.