Magnonic band structure in vertical meander-shaped CoFeB thin films
arXiv:2007.13707 · doi:10.1103/PhysRevApplied.15.014061
Abstract
The dispersion of spin waves in vertical meander-shaped CoFeB thin films consisting of segments located at 90° angles with respect to each other is investigated by Brillouin light scattering spectroscopy. We reveal the periodic character of several dispersive branches as well as alternating frequency ranges where spin waves are allowed or forbidden to propagate. Noteworthy is the presence of the frequency band gaps between each couple of successive modes only for wave numbers k=n/a, where n is an even integer number and a is the size of the meander unit cell, whereas the spectra show propagating modes in the orthogonal film segments for the other wavenumbers. The micromagnetic simulations and analytical calculations allow us to understand and explain the results in terms of the mode spatial localization and symmetry. The obtained results demonstrate the wave propagation in three dimensions opening the path for multi-level magnonic architectures for signal processing.
arXiv comment19 pages, 6 figures. This work has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 801055 "Spin Wave Computing for Ultimately-Scaled Hybrid Low-Power Electronics" - "CHIRON"
References in corpus (14)
- The design and verification of Mumax3
- Magnonic crystals for data processing
- An Introduction to Spin Wave Computing
- Hybrid magnonics: physics, circuits and applications for coherent information processing
- Reconfigurable nano-scale spin-wave directional coupler
- Magnetization Dynamics of Nanoscale Magnetic Materials: A Perspective
- Snell's Law for Spin Waves
- Spin-wave diode and circulator based on unidirectional coupling
- Flat Bands, Indirect Gaps, and Unconventional Spin-Wave Behavior Induced by a Periodic Dzyaloshinskii-Moriya Interaction
- Spin wave nonreciprocity and magnonic band structure in thin permalloy film induced by dynamical coupling with an array of Ni stripes
- Absorbing boundary layers for spin wave micromagnetics
- Reprogrammable magnonic band structure of layered Permalloy/Cu/Permalloy nanowires
- Magnonic Band Structure, Complete Bandgap and Collective Spin Wave Excitation in Nanoscale Two--Dimensional Magnonic Crystals
- Magnonic band gap and mode hybridization in continuous Permalloy film induced by vertical coupling with an array of Permalloy ellipses
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- Magnon-Magnon Interaction Induced by Dynamic Coupling in a Hybrid Magnonic Crystal
- Twist-Tuned Magnonic Nanocavity Mode in a Trilayer Moiré Superlattice