Bistable nanomagnet as programmable phase inverter for spin waves

To realize spin wave logic gates programmable phase inverters are essential. We image with phase-resolved Brillouin light scattering microscopy propagating waves in a one-dimensional magnonic crystal consisting of dipolarly coupled magnetic nanostripes. demonstrate shifts upon single nanostripe opposed magnetization. Using micromagnetic simulations we model our experimental finding wide parameter space bias fields and vectors. find that low-loss inversion is achieved, when the internal field oppositely magnetized tuned such latter supports resonant standing mode odd quantization number at given frequency. Our results key for realization optimized signal transmission.