Modulation the phase of propagating spin wave in waveguide by spin-polarized current

Phase shifter is an important constituent element of magnonic devices, especially for the operations of logic gates based on spin waves. The mechanisms and ways to control phase shift of propagating spin waves have been studied for a period of time by both experiments and theory. The most universal design of spin-wave phase shifter is to use an Ostered field produced by a highly localized dc current to enhance or reduce the local internal magnetic field on the low-loss Yttrium iron garnet (YIG) based magnonic waveguide (MW) [1-2], however, for the nanoscale of magnetic metal based MWs, which is more suitable to integrate on CMOS circuits, this modulating ways is difficult to be realized.