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Magnetization dynamics in magnonic structures with different geometries: interfaces, notches and waveguides
M Mansurova1,2, J von der Haar2, J Panke2
1Institut für Physik, Greifswald University, Felix-Hausdorff-Straße 6, 17489 Greifswald, Germany.
Summary
Researchers studied spin-wave packets at magnonic crystal interfaces. Surface spin-wave modes propagate into continuous films, with propagation distance influenced by magnetic field direction and surface geometry.
Area of Science:
- Condensed matter physics
- Materials science
- Spintronics
Background:
- Ultrafast magnetization dynamics research has advanced experimental techniques for studying magnetic materials.
- Magnonic crystals offer unique properties for controlling spin waves.
Purpose of the Study:
- To investigate broadband excitation of spin-wave packets at magnonic crystal continuous magnetic film interfaces.
- To understand the behavior and propagation of surface spin-wave modes at these interfaces.
Main Methods:
- Experimental study of spin-wave packet excitation.
- Analysis of spin-wave propagation at magnonic crystal-film interfaces.
Main Results:
- Surface spin-wave modes were observed at the interfaces, analogous to topological insulator surface states.
- These modes propagate from the magnonic crystal into the continuous magnetic film.
- The propagation distance of these surface spin-wave modes is dependent on the applied magnetic field direction and the surface geometry of the magnonic crystal.
Conclusions:
- The study demonstrates the existence and characteristics of surface spin-wave modes at magnonic crystal-film interfaces.
- These findings contribute to the understanding of spin-wave propagation in complex magnetic structures.
- The results have implications for developing novel spintronic devices and magnonic technologies.
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