Spin wave propagation in a YIG/FeRh composite structure as a system of coupled microwaveguides

In this paper present that it is possible to control the characteristics of spin waves (SW) in a system of lateral magnetic waveguides made of iron yttrium garnet (YIG) by changing the characteristics of the antiferromagnetic iron-rhodium (FeRh) layer located above these waveguides. In particular it is shown that by changing the geometric parameters and magnetization of the FeRh layer one can control the amplitude and phase of SW propagating in lateral microwaveguides. The modes under which dips appear on the transmittance amplitude-frequency response (AFR) due to redistribution of the SW power are revealed, and their location can be controlled by changing the properties of the FeRh layer. The results obtained can be used to create microwave demultiplexers and taps based on the proposed structure.