Materials World Network: Magnetization Dynamics in Metallic Ferromagnetic Nanostructures

拟议的研究计划的主要目标是获得定量的了解的自旋波的性质在个别金属铁磁纳米结构的存在下的自旋电流。最终，基本的理解将有助于创新的新兴领域的磁-一个自旋为基础的能源效率的数字信息处理。我们提出了一系列的实验，采用几个芯片上的铁磁共振技术以及近场布里渊光散射（BLS）来测量磁性纳米结构中的自旋波特性。这些测量主要集中在理解（i）几何约束对非线性自旋波相互作用的影响和（ii）自旋电流对铁磁纳米线中自旋波色散和阻尼的影响。我们将从实验和理论两方面研究这些现象，拟议的研究计划是基于该计划的PI和联合PI组（加州大学欧文分校（UCI），杜伊斯堡-埃森大学（UDE）和明斯特大学（WWUM）之间）的成熟和发展中的合作。

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)).