We investigate spin waves (SW) in yttrium iron garnet (YIG) films grown by liquid phase epitaxy on the waferscale. The YIG film was nanostructured using electron beam lithography and helium ion microscopy (HIM). Using HIM the minimum periodicity of the lattice was 100 nm. The decay length amounted to 0.86 mm, and we found a group velocity up to 5.4 km/s in the bare YIG film. The magnonic grating coupler effect induced by the HIM patterning allowed us to excite SWs with a wavelength down to 80 nm.
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We investigate spin waves (SW) in yttrium iron garnet (YIG) films grown by liquid phase epitaxy on the waferscale. The YIG film was nanostructured using electron beam lithography and helium ion microscopy (HIM). Using HIM the minimum periodicity of the lattice was 100 nm. The decay length amounted to 0.86 mm, and we found a group velocity up to 5.4 km/s in the bare YIG film. The magnonic grating coupler effect induced by the HIM patterning allowed us to excite SWs with a wavelength down to 80 nm...
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