2020/12/31 by Davi R. Rodrigues, Jonas Nothhelfer, Morteza Mohseni +4
Engineering · Mathematics · Physics and Astronomy · #Amplitude #Characterization and Applications of Magnetic Nanoparticles #Condensed matter physics #Excitation #Ferromagnetism #Magnetic field #Magnetic properties of thin films #Magnetization #Magnetization dynamics #Mathematics #Nonlinear system #Physics #Quantum mechanics #Skyrmion #Spintronics #Theoretical and Computational Physics #Topology (electrical circuits) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevapplied.16.014020
published as Phys. Rev. Applied 16, 014020 (2021) · 8 pages, 5 figures
openalex created_date 2021/01/05 · arxiv created 2021/05/19 · openalex publication_date 2021/07/08 · arxiv updated 2021/07/14 · openalex updated_date 2026/08/06
We propose that the nonlinear radio-frequency dynamics and nanoscale size of topological magnetic structures associated with their well-defined internal modes advocate their use as in materio scalable frequency multipliers for spintronic systems. Frequency multipliers allow for frequency conversion between input and output frequencies, and thereby significantly increase the range of controllably accessible frequencies. In particular, we explore the excitation of eigenmodes of topological magnetic textures by fractions of the corresponding eigenfrequencies. We show via micromagnetic simulations that low-frequency perturbations to the system can efficiently excite bound modes with a higher amplitude. For example, we excite the eigenmodes of isolated ferromagnetic skyrmions by applying half, a third, and a quarter of the corresponding eigenfrequency. We predict that frequency multiplication via magnetic structures is a general phenomenon that is independent of the particular properties of the magnetic texture and works for magnetic vortices, droplets, and other topological textures.