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.
@article{arxiv.1304.7122,
title = {A micro-structured ion-implanted magnonic crystal},
author = {Björn Obry and Philipp Pirro and Thomas Brächer and Andrii V. Chumak and Julia Osten and Florin Ciubotaru and Alexander A. Serga and Jürgen Fassbender and Burkard Hillebrands},
journal= {arXiv preprint arXiv:1304.7122},
year = {2013}
}
Comments
4 pages, 3 figures, submitted to Applied Physics Letters