Quasi-nonlocal harmonic detection of magnon-mediated spin-current generation in metallic Py/Pt bilayers
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
Authors
- Yoichi Shiota (ORCID: https://orcid.org/0000-0003-1199-8438)
- Takahiro Moriyama (ORCID: https://orcid.org/0000-0001-7071-0823)
- Kyoung‐Woong Moon (ORCID: https://orcid.org/0000-0002-2558-8985)
- Kyoung‐Whan Kim (ORCID: https://orcid.org/0000-0002-1382-7088)
- Kab‐Jin Kim (ORCID: https://orcid.org/0000-0002-8378-3746)
- Tian Li (ORCID: https://orcid.org/0000-0003-2993-0386)
- Teruo Ono (ORCID: https://orcid.org/0000-0002-9629-0633)
- Hyun-Woo Lee
- Kyung-Jin Lee
- Sanghoon Kim
Institutions
- Pohang University of Science and Technology (KR)
- Korea Advanced Institute of Science and Technology (KR)
- Yonsei University (KR)
- Kyoto University (JP)
- Korea Research Institute of Standards and Science (KR)
- University of Ulsan (KR)
- Kyoto University Institute for Chemical Research (JP)
- Nagoya University (JP)
Publication Details
- Journal
- Applied Physics Express
- Published
- 2026-11-09
- DOI
- https://doi.org/10.35848/1882-0786/aebff0
- Primary Topic
- Magnetic properties of thin films
- Type
- article
- Field-Weighted Citation Impact
- 0.00