Björn Obry, Philipp Pirro, Thomas Brächer, Andrii V. Chumak, Julia Osten, Florin Ciubotaru, Alexander A. Serga, Jürgen Fassbender, Burkard Hillebrands
We investigate spin-wave propagation in a microstructured magnonic-crystal waveguide fabricated by localized ion implantation. The irradiation caused a periodic variation in the saturation magnetization along the waveguide. As a consequence, the spin-wave transmission spectrum exhibits a set of frequency bands, where spin-wave propagation is suppressed. A weak modification of the saturation magnetization by 7% is sufficient to decrease the spin-wave transmission in the band gaps by a factor of 10. These results evidence the applicability of localized ion implantation for the fabrication of efficient micron- and nano-sized magnonic crystals for magnon spintronic applications.
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http://arxiv.org/abs/1304.7122
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