“…2,3) A ferromagnetic resonance (FMR) technique is useful and sensitive for determining the microwave frequency behavior of any magnetic thin film. [4][5][6] It provides information about various important ferromagnetic material properties of, such as the effective magnetization (M eff ), effective crystalline magnetic anisotropy field (H K1 ), effective uniaxial magnetic anisotropy field (H U ), and g-value, using FMR spectra. The linewidth of the FMR spectra is directly related to the damping of spin dynamics and inhomogeneity in the films: defects, impurities, vacancies, etc.…”