Single-shot electrical detection of short-wavelength magnon pulse transmission in a magnonic thin-film waveguide

Journal Article · 31 March 2025 · npj Spintronics (Online)

DOI: https://doi.org/10.1038/s44306-025-00072-5 · OSTI ID:2544425

Song, Moojune; Lim, Jinho; Zhang, Wei; Bozhko, Dmytro A.; Divan, Ralu; Hoffmann, Axel; Kim, Kab-Jin; Novosad, Valentine; Li, Yi

Abstract The advance of magnon spintronics requires understanding of time-domain magnon pulse transmission in order to develop high-speed information processing protocols. In this work, we demonstrate single-shot electrical detection of narrow-band magnon pulse transmission in a yttrium iron garnet thin-film delay line. The high signal-to-background ratio of magnon transmission band allows us to directly probe the magnon transmission electrically using a fast oscilloscope and to study its spectral evolution using Fast Fourier Transform (FFT) of the time-domain transmitted signal. At elevated input power, we show a magnon transmission reduction and a spectral distortion, which can be understood by the nonlinear magnon excitation in the transmission band defined by the antenna geometry. In addition, we also find that the higher- (lower-) frequency magnon spectral component exhibits a lower (higher) magnon group velocity, showing a dispersion agreeing with the Damon-Eshbach dependence. Our results provide important guidance of magnon pulse engineering for their applications in spin wave computing and coherent magnon information processing.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-06CH11357; SC0022060
• OSTI ID: 2544425
• Journal Information: npj Spintronics (Online), Journal Name: npj Spintronics (Online) Journal Issue: 1 Vol. 3; ISSN 2948-2119
• Publisher: Nature Publishing GroupCopyright Statement
• Country of Publication: United Kingdom
• Language: English