Spin-wave wavelength down-conversion at thickness steps

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Abstract

© 2018 The Japan Society of Applied Physics. We report a systematic experimental study on the refraction and reflection of magnetostatic spin-waves at a thickness step between two Permalloy films of different thickness. The transmitted spin-waves for the transition from a thick film to a thin film have a higher wave vector compared to the incoming waves. Consequently, such systems may find use as passive wavelength transformers in magnonic networks. We investigate the spin-wave transmission behavior by studying the influence of the external magnetic field, incident angle, and thickness ratio of the films using time-resolved scanning Kerr microscopy and micro-focused Brillouin light scattering.

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Stigloher, J., Taniguchi, T., Madami, M., Decker, M., Körner, H. S., Moriyama, T., … Back, C. H. (2018). Spin-wave wavelength down-conversion at thickness steps. Applied Physics Express, 11(5). https://doi.org/10.7567/APEX.11.053002

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