Detection of spin-wave excitations of a domain structure in an yttrium-iron garnet film using the inverse spin Hall effect

Using the inverse spin Hall effect, the generation of EMF in a waveguide cut from an epitaxial film of yttrium-iron garnet (YIG) of crystallographic orientation (111) with a thickness of 15.6 $\mu$m and dimensions of 10 $\times$ 5 mm was studied, on the surface of which a strip of platinum with a thickness of 4 nm, a width of 25 $\mu$m and a length of 4 mm was deposited, when used as a pump spin-wave excitations of the domain structure. The magnetization field tangent to the surface of the structure was directed parallel to the crystallographic axis $\langle1\bar10\rangle$ of the YIG film. The possibility of EMF registration is shown both in the case of in-phase and antiphase magnetization oscillations in domains and for domain walls' displacement waves. The dependence of the measured EMF level on the type of spin-wave excitation and the magnitude of the magnetization field is investigated. It is shown that the volt-watt sensitivity (the ratio of EMF to the power of spin-wave excitation) can be comparable with a similar parameter for saturated YIG films.