Concentration and Angular Dependences of Ferromagnetic Resonance Parameters and Magnetic Structure of CoTaNb/MgO Composite Films

Concentration and angular dependences of the parameters (line width and position) of ferromagnetic resonance (FMR) for CoTaNb/MgO composite films with metal alloy concentrations x = 0.27–0.72 were obtained in the work. Granular, granular-percolation structure and zigzag stripe magnetic structure for films with different x were detected. An increase in the FMR parameters with an increase in the angle from 0° to 90° between the constant magnetic field and the film plane with different x was observed. It was shown in the work that the behavior of the angular dependences strongly depends on the magnetic structure of the films, which have the greatest change in the region of transition from granular to granular-percolation structure with extended magnetic metallic microregions. The FMR method is a structure-sensitive method for scientific studies of the electromagnetic properties of thin magnetic composite films with granular and percolation structures and their combinations was demonstrated.