Journal
SCIENTIFIC REPORTS
Volume 12, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41598-022-24969-x
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Funding
- National Science Centre, Poland [2017/24/T/ST3/00173, 2018/30/E/ST3/00267, 2020/39/I/ST3/02413, 2020/39/O/ST5/02110]
- Foundation of Alfried Krupp Kolleg Greifswald
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In this study, the influence of geometrical parameters on the fundamental spin-wave mode in planar 1D magnonic crystals is investigated. The results show that the width of stripes and the width of gaps between them can affect the spin-wave frequencies by confining the spin waves inside the stripes and freeing the spin waves to a different extent on the edges of stripes. The frequency of the fundamental mode can be tuned by adjusting the geometrical parameters.
We present experimental and numerical studies demonstrating the influence of geometrical parameters on the fundamental spin-wave mode in planar 1D magnonic crystals. The investigated magnonic crystals consist of flat stripes separated by air gaps. The adjustment of geometrical parameters allows tailoring of the spin-wave frequencies. The width of stripes and the width of gaps between them affect spin-wave frequencies in two ways. First, directly by geometrical constraints confining the spin waves inside the stripes. Second, indirectly by spin-wave pinning, freeing the spin waves to a different extent on the edges of stripes. Experimentally, the fundamental spin-wave mode frequencies are measured using an all-optical pump-probe time-resolved magneto-optical Kerr-effect setup. Our studies address the problem of spin-wave confinement and spin-wave dipolar pinning in an array of coupled stripes. We show that the frequency of fundamental mode can be tuned to a large extent by adjusting the width of the stripes and the width of gaps between them.
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