Excitation of exchange spin waves in the transition layer of the two-layer ferrite-ferrite structure

•Intense excitation of exchange spin waves in a tangentially magnetized two-layer epitaxial film of iron yttrium garnet.•Mathematical processing of the measured frequencies of resonance peaks for the calculation of the magnetization profile of the doped layer and the modeling of the excitation and propagation processes of exchange spin waves.•Application of mathematical proposed methodology for non-destructive control of the layered structure of epitaxial ferrite structures. The possibility of intense excitation of exchange spin waves in a tangentially magnetized two-layer epitaxial film of iron yttrium garnet is demonstrated. The waves are excited in a thin transition layer at the interface between the ferrite layers, propagate into the doped layer with reduced magnetization, and reflect from its opposite surface. In continuous excitation mode, they can be observed as a series of spin wave resonance peaks. Mathematical processing of the measured frequencies of resonance peaks allows for the calculation of the magnetization profile of the doped layer and the modeling of the excitation and propagation processes of exchange spin waves. The proposed methodology of mathematical processing can be applied for non-destructive control of the layered structure of epitaxial ferrite structures.