Figure 4. Comparison of the a.c.- and d.c.-ISHE amplitude and material dependence.

(a) Comparison of the a.c.- and d.c.-ISHE voltages for the same device measured at 6 GHz in the out-of-plane excitation configuration. The a.c.-ISHE voltage is ~12 times larger than the d.c. one. (b,c) Comparison of the a.c.-ISHE signals for Pt/Ni₈₀Fe₂₀, Au/Ni₈₀Fe₂₀, Cu/Ni₈₀Fe₂₀ and Al/Ni₈₀Fe₂₀ measured at 8 GHz. (b) Shows data for samples with in-plane excitation while (c) shows the corresponding measurements with out-of-plane excitation. All NM and FM layers have a thickness of 10 nm. Only for NM=Cu the NM layer is 20 nm.