Nonreciprocal attenuation of magnetoelastic Rayleigh waves on bulk-YIG samples

Experimental results on nonreciprocal attenuation of magnetoelastic Rayleigh waves are reported for two bulk-YIG samples. In both cases, the nonreciprocity is found to be weak. In particular, the bulk-YIG version of the Lewis-Patterson YIG-film configuration (which exhibited a maximum nonreciprocity of about 20 dBs) is found to be essentially reciprocal.