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Quasi-nonlocal harmonic detection of magnon-mediated spin-current generation in metallic Py/Pt bilayers

Year: 2026
Type: article
Abstract: Magnons play a central role in spin transport and magnetoresistive phenomena in magnetic heterostructures. In ferromagnet(FM)/nonmagnet(NM) bilayers, unidirectional magnetoresistance (UMR) arises from both spin accumulation and magnon-mediated processes, yet their individual contributions remain unclear. In this work, we employ a non-local harmonic measurement geometry to understand the magnon contribution to UMR in the FM/NM bilayer. By analyzing the non-local harmonic voltages, we demonstrate that high-energy magnons are more efficient in driving spin pumping and spin-current generation than low-energy modes. These results establish high-energy magnons as a key factor in spin conversion and provide a perspective for designing efficient magnon-based devices
DOI: 10.35848/1882-0786/aebff0
Authors: Tian Li, Kyoung-Whan Kim, Kyoung-Woong Moon, Yoichi Shiota, Takahiro Moriyama, Kyung-Jin Lee, Hyun-Woo Lee, Sanghoon Kim, Kab-Jin KIM, Teruo ONO
Institutions: Kyoto University Institute for Chemical Research, Korea Advanced Institute of Science and Technology, Yonsei University, Korea Research Institute of Standards and Science, Kyoto University, Nagoya University, Pohang University of Science and Technology, University of Ulsan
Language: English
Open Access status: gold
Estimated APC paid: $2,365
OpenAlex ID: W7225636831
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