NONRECIPROCAL MAGNETOELASTIC RAYLEIGH WAVES.

The propagation characteristics of magnetoelastic Rayleigh waves propagating in an arbitrary direction on a tangentially magnetized YIG substrate are treated. The Rayleigh waves are found to exhibit nonreciprocal characteristics. Within a spectrum of frequencies given approximately by the magnetostatic bulk wave spectrum, the surface waves change from leaky to bound waves as the angle psi between the propagation direction and the bias field is increased through a critical value that is slightly larger than the psi pertinent to magnetostatic plane waves at the same frequency. Outside of this frequency spectrum, the surface waves are of the bound variety for all psi .