Figure 2
From: Tunable short-wavelength spin wave excitation from pinned magnetic domain walls
(a) Time evolution of the magnetic pertubation 
averaged over a 400 nm wide region around the domain wall after the application of a 1 ns current pulse. (b) PSDs of the curves presented in (a). (c,d) Sketch of magnetization precession inside the domain wall. At resonance, the magnetic domain wall oscillates back and forth (displacement to the left in (c) and to the right in (d)). (e) Shape of the pinning potential. Symbols are numerical data and the red line is calculated using 
, with κ and 
indicating the domain wall stiffness and wall displacement along the x-axis. For current densities 
A/m2, the pinning potential becomes increasingly anharmonic.
