A fundamental characterization technique for the current research in spintronics is the ferromagnetic resonance (FMR) spectroscopy. For many decades, FMR spectroscopy has been carried out using single frequency microwave cavities [1]. More recently, the apparition of broadband FMR spectroscopy have meant a qualitative jump in the effciency of FMR to extract material parameters from ferromagnetic thinlms. Moreover, the recent discovery of the spin rectication effect (SRE) has allowed to perform FMR spectroscopy on nanometric structures.