Spin waves propagation and confinement in conducting films at the micrometer scale

The propagating spin wave spectroscopy (PSWS) technique is applied for the rst time to metallic thin film patterns, allowing to measure their magnetos tatic wave modes. Using micrometer scale local excitation and detection, we show that magnetostatic surface waves propagate on a distance as long as 4 0 mum in a continuous permalloy lm. In micrometer wide permalloy stripes, w e observe both quantized spin wave modes and quasi-saturation modes, well e xplained by existing models. In addition, low-frequency additional modes we re observed which, we suggest, are generated in the magnetically inhomogene ous edge regions.