Coupled spin waves in magnetic waveguides induced by elastic deformations in YIG–piezoelectric structures

The numerical simulation and Brillouin spectroscopy measurement have demonstrated the possibility of controlling the properties of coupled spin waves propagating in a transversely limited layered YIG–piezoelectric structure. It has been shown that an electric field applied to the piezoelectric layer induces an inhomogeneous distribution of an internal magnetic field in the ferromagnetic layer, which results in the formation of waveguide channels for spin magnetostatic waves. In this case, the properties of coupled spin waves can be efficiently controlled by varying the magnetization angle of the structure. The results demonstrate the possibility of integration of straintronics and magnonics to fabricate electric- and magnetic-field-controlled power splitters, multiplexers, and microwave couplers.