Microwave methods as a means to estimate the uniformity of the magnetic parameters of multilayer structured elements

The possibility of microwave methods (ferromagnetic and spin-wave resonance) for characterize of multilayer planar elements having modulation of both structural and magnetic parameters of the systems is demonstrated. The measurements carried out in out-of-plane orientation allowed us to detect the range of orientation angle of the applied magnetic field, within which the system can be considered as an effective medium with a small dispersion of average dimensions. Also the analysis of the angle dependences allowed us to estimate a number of the fundamental magnetic parameters: effective magnetization, exchange interaction constant, surface anisotropy constant, the field of perpendicular magnetic anisotropy.