Journal
COMMUNICATIONS PHYSICS
Volume 1, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s42005-018-0052-1
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Funding
- Max-Planck-Institute for Intelligent Systems, Department Schutz
- Deutsche Forschungsgemeinschaft [Sonderforschungsbereich 668]
- excellence cluster 'The Hamburg Centre for Ultrafast Imaging - Structure, Dynamics, and the Centre of Matter at the Atomic Scale' of the Deutsche Forschungsgemeinschaft
- MAXYMUS team
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Spin waves with wavelengths in the nanometre range could serve as data carriers in future magnonic logic or signal processing devices. We investigate the interference of spin waves emitted from magnetic vortices in two exchange-coupled vortex stacks. The spin-wave dynamics are studied using scanning transmission X-ray microscopy and micromagnetic simulations. Stacks of vortices provide an excellent controllability of spin-wave properties including a tunable wavelength in the 100 nm regime and manipulation of their propagation direction via the magnetisation configuration. Furthermore, interference gives rise to amplified or reduced spin-wave amplitudes in distinct areas of the structure providing controlled confinement crucial for future applications of spin waves.
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