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We investigate the spin-wave excitation in microscopic waveguides fabricatedby localized Cr+ ion implantation in a ferromagnetic Ni(81)Fe(19) film. Wedemonstrate that spin-wave waveguides can be conveniently made by thistechnique. The magnetic patterning technique yields an increased damping and areduction in saturation magnetization in the implanted regions that can beextracted from Brillouin light scattering measurements of the spin-waveexcitation spectra. Furthermore, the waveguide performance as well as theinternal field of the waveguide depend on the doping fluence. The results provethat localized ion implantation is a powerful tool for the patterning of magnonspintronic devices.

Microscopic magnetic structuring of a spin-wave waveguide by ion implantation in a Ni(81)Fe(19) layer