Imaging of short-wavelength spin waves in a nanometer-thick YIG/Co bilayer
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2023-05-15
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en
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6
1-6
1-6
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Applied Physics Letters, Volume 122, issue 20
Abstract
We report the imaging of short-wavelength spin waves in a continuous nanometer-thick YIG film with a Co stripe patterned on top. Dynamic dipolar coupling between the YIG film and the Co stripe lowers the spin-wave wavelength when spin waves enter the YIG/Co bilayer region from the bare YIG film, causing partial reflection at the YIG/Co edge. We use time-resolved scanning transmission x-ray microscopy to image the mode conversion process down to a wavelength of 280 nm and extract the spin-wave dispersion, decay length, and magnetic damping in the YIG/Co bilayer. We also analyze spin-wave reflection from the YIG/Co edge and its dependence on the wavelength of incoming and transmitted spin waves.Description
Funding Information: This work was supported by the Academy of Finland (Grant Nos. 317918, 325480, and 338748). Lithography and FIB milling were performed at the OtaNano-Micronova Nanofabrication Center and the OtaNano-NanoMicroscopy Center, respectively, supported by Aalto University. Computational resources were provided by the Aalto Science-IT project. We thank Helmholtz-Zentrum Berlin for the allocation of synchrotron radiation beamtime.
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Talapatra, A, Qin, H, Schulz, F, Yao, L, Flajšman, L, Weigand, M, Wintz, S & van Dijken, S 2023, ' Imaging of short-wavelength spin waves in a nanometer-thick YIG/Co bilayer ', Applied Physics Letters, vol. 122, no. 20, 202404, pp. 1-6 . https://doi.org/10.1063/5.0149583
