A detailed study of SSWM’s was carried out using the reference 74nm-thick single-layer Py film from Series 1. A coplanar transducer was chosen to drive and detect magnetization precession. Measurements were taken with the static applied field aligned along the direction of the uniaxial anisotropy axis, and field sweeps were made from 0 up to 15GHz. The measured dependencies of resonance fields for the observed modes on the driving frequency are shown in Fig. 5a. For this film a best fit gives a saturation magnetization value of 4 πM$_{s}$ = 8120 ± 60 G, g-factor of g = 2 . 05, and an exchange constant of A ≃ 0 . 41 × 10 − 6 erg/cm. These parameters provide consistent results for all measured Py thicknesses for Series 1. The fits were made as follows. Since it was found that conductivity and an eventual weak surface pinning of magnetization have negligible effect on the frequency of the fundamental mode, the ω ( H ) dependence for this mode was used in the expression for in-plane FMR, ω 2 = γ $^{2}$H ( H + M$_{s}$ ), in order to determine M$_{s}$ . A best fit was obtained using regression analysis. The values of M$_{s}$ obtained this way were then used to fit the experimental data for the SSWM frequency ω/ (2 π ) = 15GHz with our theory [14], leading to the above value of A. As was done for data from Series 2, we have assumed that the SSWM peak corresponds to the first standing spin wave mode. As noted earlier, efficient excitation of the asymmetric modes is not possible unless a film has very different pinning conditions for magnetization at two film surfaces. Using the approach of Ref. [21] we find that the experimental intensity for the SSWM cannot be obtained unless one assumes a near complete pinning of magnetization at one of the film surfaces. Such a large pinning is inconsistent with the small cavity FMR mode intensities. Strong pinning is also inconsistent with measured resonant field since pinning considerably shifts the fundamental and SSWM resonant fields downwards. Moreover, if one assumes that the SSWM is instead the second, symmetric, SSWM one then obtains an unrealistically small value for the exchange constant: A ≃ 0 . 11 × 10 − 6 erg/cm. Furthermore, as will be discussed in the next section, the spectra from bilayer films in this series display several high order SSWM’s. We therefore conclude that the observed SSWM is in fact the first, odd symmetry mode, and is not strongly pinned at either surface. This observation is thus additional evidence for eddy current induced SSWM in conducting films. 9