Interaction of Acoustic Waves With Spin Waves Using a GHz Operating GaN/Si SAW Device With a Ni/NiFeSi Layer Between Its IDTs.

A two-port surface acoustic wave (SAW) device was developed to be used for the control and excitation via spin waves (SWs). The structure was manufactured using advanced nanolithography techniques, on GaN/Si, enabling fundamental Rayleigh interdigitated transducer (IDT) resonances in the GHz frequency range. The ferromagnetic resonance (FMR) of the magnetostrictive Ni/NiFeSi layer placed between the IDTs of the SAW device can be tuned to the SAW resonance frequency by magnetic fields.