The electric and magnetic properties of Co and Fe films percept from the coexistence of ferromagnetic and microstrip resonance for a T-type microstrip

Ferromagnetic resonance for magnetic thin films is found to be coexisted with the transmission resonance of a T-type microwave microstrip at certain applied magnetic fields. The frequency dependence of conductivity, the magnetization, and the magnetic anisotropy of magnetic films can be eventually solved from the measured resonance frequency and quality Q factors of the resonance spectra. Equivalent resistances (R), inductances (L), and capacitances (C) corresponding to the displayed transmission S21 spectra are simulated to comply with proper values. With this equivalent circuit, an accurate determination of the magnetic properties can be closely scrutinized.