Micromagnetic simulation of a majority" logic gate based on the interference of spin waves' caustics

Abstract

Using micromagnetic simulations, we show the possibility to build spin logic devices based on films of yttrium iron garnet and permalloy where energy channeling of spin waves is achieved due to excitation of focused and narrow-directed wave beams by used antennas. We studied the methods to construct a "majority" logic gate based on the interference of caustics of spin waves excited by the rectilinear transducers directed at an angle to the in-plane magnetic field. We propose an approach when adding a reference signal with fixed initial phase to three information signals allows to use an amplitude detector at the output of the device to built a truth table. The possibility to scale the device on the example of its work in the range of spin waves with micron and submicron wavelengths is demonstrated. Keywords: spin waves, magnetic field, ferromagnetic films, permalloy.