Materials World Network: Magnetization Dynamics in Metallic Ferromagnetic Nanostructures

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The main goal of the proposed research program is to gain quantitative understanding of the properties of spin waves in individual metallic ferromagnetic nanostructures in the presence of spin currents. Ultimately, the fundamental understanding will contribute to innovation in the emerging field of magnonics – a spinbased energy efficient processing of digital information. We propose a series of experiments that employ several on-chip ferromagnetic resonance techniques as well as near-field Brillouin Light Scattering (BLS) to measure spin wave properties in magnetic nanostructures. These measurements mainly focus on understanding of (i) the effect of geometric confinement on nonlinear spin wave interactions and (ii) the effect of spin currents on spin wave dispersion and damping in ferromagnetic nanowires. We will study these phenomena both experimentally and theoretically, and the proposed program of research is based on both well-established and developing collaborations within the group of PIs and co-PIs of this program (between the University of California, Irvine (UCI), the University of Duisburg-Essen (UDE) and the University of Muenster (WWUM)).