Abstract
The magnetic properties of various samples were investigated through vibrating sample magnetometer, electron spin resonance (ESR), and vector network analyzer ferromagnetic resonance (VNA-FMR) techniques, respectively. The corresponding saturation magnetization $4\pi M_{s}$ and in-plane magnetic anisotropy field $H_{k}$ of those different films were estimated by the three methods. A comparative investigation of the three techniques, especially for ESR and VNA-FMR, on the estimation of $4\pi M_{s}$ and $H_{k}$ was analyzed systematically. The influence of omitted $H_{k}$ on the data of $4\pi M_{s}$ and $H_{k}$ was also studied. The results provide a quite clear conclusion for the measurements of $4\pi M_{s}$ and $H_{\mathbf {k}}$ in different conditions.
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