Spin Waves in YIG-Based Networks: Logic and Signal Processing

An eight-port magnonic network was fabricated from 1 μm thick epitaxial yttrium iron garnet (YIG) film by the photolithography and ion-etching techniques. The network had a form of the 2 × 2 lattice of the 10 μm wide and 100 μm long YIG waveguides with inductive micro-antennas located at the ends and spaced by 90 μm. Effects of the spin waves (SW) propagation and interference in the network were studied experimentally and by micromagnetic simulation. It was shown that one can realize the constructive and destructive interference of the SW at the output transducers by changing the input signals phase. Possibilities to build logic gates and magnetic sensors based on the SW interference was demonstrated.