Spin waves - a fine probe for itinerant ferromagnetism, and an alternative for electronic devices

For decades, magnetization dynamics has continued to generate a vivid interest for its numerous applications in microwave electronics and telecommunication. More recently, the non-uniform dynamics of magnetization (e.g. spin waves) has sparked a renewed attraction, suggesting alternative solutions for computation functionalities 1,2. Furthermore, apart from their technological potential, spin waves also appear to be a formidable tool to characterize spin transport in ferromagnetic metals 3-5. In this presentation, I will present in the first part how the spin wave Doppler technique enables to probe independently some of the different spin-dependent scattering mechanisms. In the second part, I will review some of the major advances in magnonics and present the first experimental evidences of a spin wave beam in continuous layer of thin YIG films.