Ferromagnetic resonance in ferrite garnet bilayer magneto-bounded films

A study was made on high-frequency magnetic properties of bilayer ferrite-garnet films, used when creating domain-containing structures for devices on cylindrical magnetic domains. Magnetic interaction between layers of 0.3 and 3 μm thickness was revealed by the method of ferromagnetic resonance (FMR). The dependence of resonance FMR fields for two signals, corresponding to these layers, on the angle of magnetic field inclination is close to one, obtained in the model of uniaxial anisotropy of light axis type for thick and light plane - for thin layers. Effect of magnetic interaction is manifested in 1) sharp decrease of line width of FMR signal from thin layer at temperatures, exceeding the Neel point for a thick layer; 2) narrowing of the signal from thick layer near the value of field inclination angle at which resonance frequencies in both layers coincide