sample length along the transducer. The imaginary part of the effective permeability scales linearly with Re ( Z$_{r}$ ) and its real part scales with Im ( Z$_{r}$ ). We found that | Im ( Z$_{r}$ ) | << Re ( Z$_{r}$ ) for all our experimental data. This is in good agreement with the theoretical result shown in Fig.1 of Ref.[14]. Thus S 21( H ) /S 21$_{0}$( H ) ≈ Re ( S 21( H ) /S 21$_{0}$( H )) and Re ( Z$_{r}$ ) ≈ 2 z$_{0}$l ln( Re ( S 21 /S 21$_{0}$)). Note that Z$_{r}$ values extracted from the experiment are absolute, and therefore can be used for extraction of film material parameters using the existing theory in Ref.[14] or similar. Furthermore, the Re ( S 21( H ) /S 21$_{0}$( H )) values off-resonance represent contribution to Z$_{r}$ from eddy-current losses. For metallic samples this nonmagnetic contribution is much larger than the precessional magnetic one as seen from Figs. 3 and 5. For different samples the off-resonance transmission Re ( S 21( H ) /S 21$_{0}$( H )) varies from 0.2 to 0.5 (i.e. from -14 to -6 dB), but the resonance contribution is less than 1 percent (0.1 dB) of the off-resonance value in all panels. Finally, this effect should be observed for a number of different excitation geometries provided that the microwave field flux is incident on the bi-layer structure from one surface only. The present experiment with the hollow waveguide (Fig. 9) is in full agreement with this prediction. Unlike what is observed for single films, we find a strong frequency dependence of the amplitude of the first standing spin wave mode relative to the fundamental mode amplitude in stripline response for bilayers. Most significantly, the response amplitude is strongly dependent on the ordering of layers with respect to a stripline transducer. As discussed previously, quantitative analysis of the observed mode amplitudes can be made in terms of screening by eddy currents existing in the metallic films with thicknesses below the microwave magnetic skin depth. This effect, as illustrated by our examples of exchange coupled Co/Py bilayers, is useful for studying buried magnetic interfaces and exchange effects in conducting structures. We conclude by discussing the reasons why efficient excitation of high order standing spin wave modes was observed with coplanar and stripline transducers, but not with cavity FMR or inelastic light scattering. We begin the discussion by noting that according to Eq. 2, it 7. Conclusion: comparison of different measurement techniques 16