Figure 1: Nature Communications

Fig. 1

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

Fig. 1

Schematic plot of the experimental setup. Circularly polarized X-rays illuminate the sample in the form of 20 ps pulses with a repetition rate of f 0 ≈ 500 MHz. The interdigital transducer, IDT1, of the hybrid device receives an AC electric signal of the same frequency, which is phase locked to the synchrotron repetition rate, generating a piezoelectric surface acoustic wave (SAW) that propagates through the LiNbO3 substrate and interacts with the magnetic nanostructures. The phase-resolved variation of the piezoelectric voltage at the surface sample is probed with the PEEM, as well as the magnetization contrast along the X-ray propagation direction arising from the XMCD effect. In a, a PEEM image with a field of view of 20 × 20 μm2 shows four 2 × 2 μm2 Ni squares in presence of a piezoelectric wave front—black and white stripes indicate the sign of the piezoelectric voltage. In b an XMCD image of the same structures showing magnetic domains within the Ni squares. In c experimental rf-power spectrum of the transmission coefficient between IDT1 and IDT2, S 12, tuned to have a maximum at f 0. The resonance frequency f 0 is marked by a yellow line