Figure 3: Nature Communications

Fig. 3

From: Direct imaging of delayed magneto-dynamic modes induced by surface acoustic waves

Fig. 3

Simultaneous images of SAW and magnetic domains. a PEEM and b XMCD–PEEM images of a 2 × 2 μm2 Ni square at different phases of the SAW. Images correspond to phase lapses of 60° (that correspond to 333 ps). PEEM images are 8 × 8 μm2; XMCD–PEEM images are 4 × 4 μm2. c and d are schematic plots of the effect of SAW on Ni squares for configurations where SAW were aligned with the squares’ sides c and with the squares’ diagonals d. e Analysis of the domain configuration from multiple (4) Ni squares of 2 × 2 μm2 as a function of the individual phase with respect to the SAW for the configuration shown in c. We computed the area of black and white domains (amount of magnetization along the X-ray incidence direction). f Analysis of the domain configuration from multiple (9) Ni squares of 2 × 2 μm2 as a function of the individual phase with respect to the SAW for the configuration shown in d. We computed the intensity difference of the relative normalized gray domains, (I(G1) − I(G2))/(I(W) − I(B)). A best fit to the data with a sinusoidal function is plotted in red in both b and c. Delays of τ = 48° ± 3 and τ = 15° ± 3 with respect to the strain wave were obtained, respectively, for the two configurations. A schematic strain wave is plotted in green (with no scale) to indicate the phase values corresponding to maximum and minimum strain