Research Area: | Magnonics | Year: | 2020 |
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Type of Publication: | Article | Keywords: | magnonics, magnonic crystals, edge modes |
Authors: |
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Journal: | Physical Review B | Volume: | 101 |
Pages: | 014403 | ||
BibTex: |
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Abstract: | We study the spin-wave dynamics in nanoscale antidot lattices based on Co/Pd multilayers with perpendicular
magnetic anisotropy. Using time-resolved magneto-optical Kerr effect measurements we demonstrate that the
variation of the antidot shape introduces significant change in the spin-wave spectra, especially in the lower
frequency range. By employing micromagnetic simulations we show that additional peaks observed in the
measured spectra are related to narrow shell regions around the antidots, where in-plane domain structures are
formed. This is because the magnetic anisotropy in these regions is reduced due to the Ga+ ion irradiation during
the focused ion beam milling process of the antidot fabrication. The results point at possibilities for exploitation
of localized spin waves in out-of-plane magnetized thin films, which are easily tunable and suitable for magnonic
applications. |
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