2014/03/11 by Ben Van de Wiele, F. Montoncello, Van de Wiele, Ben +1 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Characterization and Applications of Magnetic Nanoparticles #Chemical and Physical Properties of Materials #FOS: Physical sciences #Magnetic properties of thin films #Magneto-Optical Properties and Applications #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Photorefractive and Nonlinear Optics
paper · pdf · doi:10.48550/arxiv.1403.2549
openalex publication_date 2014/03/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We propose an alternative micromagnetic approach to determine the spin wave\ndispersion relations in magnonic structures. Characteristic of the method is\nthat a limited area of the system is continuously excited with a spatially\nuniform oscillating field, tuned at a given frequency. After a transitory time,\nthe regime magnetization dynamics is collected and a spatial Fourier analysis\non it determines the frequency vs wave vector relation. Combining several\nsimulations in any predetermined range of frequencies, at any resolution, we\ninvestigate the dispersion relations for different kinds of magnonic crystals:\na dot array, an antidot array, and a bicomponent film. Especially compared to\ntraditional pulse-excitation methods this technique has many advantages. First,\nthe excitation power is concentrated at a single frequency, allowing the\ncorresponding spin waves to propagate with very low attenuation, resulting in a\nhigher k-space resolution. Second, the model allows to include very large wave\nvector components, necessary to describe the high-frequency response of\nnon-quantized spin waves in quasi-continuous systems. Finally, we address some\npossible experimental opportunities with respect to excitation/detection\ntechniques over large distances and the observation of the odd/even symmetry of\nspin waves using Brillouin light scattering.\n