Figure 11.

Spectra of the modulation frequencies $\nu$ (normalised to ${\tau }_{GL}^{-1}$) of the temporal voltage signals shown in Figure 10. (A) 0.231$J_{DP}$, (B) 0.252$J_{DP}$, (C) 0.270$J_{DP}$, (D) 0.327$J_{DP}$, (E) 0.387$J_{DP}$ and (F) 0.504$J_{DP}$.