Spin-wave propagation in a microstructured magnonic crystal
A. V. Chumak, P. Pirro, A. A. Serga, M. P. Kostylev, R. L. Stamps, H., Schultheiss, K. Vogt, S. J. Hermsdoerfer, B. Laegel, P. A. Beck, and B., Hillebrands
TL;DR
This paper investigates microwave spin wave transmission in a microstructured magnonic crystal, demonstrating controllable band gaps and validating experimental results with theoretical models.
Contribution
It provides the first combined experimental and theoretical analysis of spin wave propagation in a permalloy waveguide with periodic width variations.
Findings
Clear rejection frequency band observed
Band gap frequency controlled by magnetic field
Good agreement between measurements and models
Abstract
Transmission of microwave spin waves through a microstructured magnonic crystal in the form of a permalloy waveguide of a periodically varying width was studied experimentally and theoretically. The spin wave characteristics were measured by spatially-resolved Brillouin light scattering microscopy. A rejection frequency band was clearly observed. The band gap frequency was controlled by the applied magnetic field. The measured spin-wave intensity as a function of frequency and propagation distance is in good agreement with a model calculation.
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