Electrical Manipulation of Magnon Diffusion Length in Pt/YIG Three-Terminal Devices.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41560441.
- Also identified by DOI 10.1021/acs.nanolett.5c05542 and PMC identifier 12879919.
- Licence recorded as CC BY-NC-ND.
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Abstract
Magnons transport spin angular momentum without involving charge current, offering the potential for energy-efficient spintronic devices. While the generation, manipulation, and detection of magnons, key elements for magnonic devices, have been demonstrated in various systems, electrical control of the magnon diffusion length (λ<sub>m</sub>) has not been reported. In this work, we demonstrate electrical control of λ<sub>m</sub> in three-terminal Pt/YIG devices, where injector-to-detector distance and modulator widths are systematically varied. We observe that λ<sub>m</sub> can be effectively tuned by the modulation current, with strong dependence on the injection current (<i>I</i><sub>inj</sub>). At low <i>I</i><sub>inj</sub>, λ<sub>m</sub> increases from 0.84 to 1.8 μm under a modulation current density of 5.5 × 10<sup>7</sup> A/cm<sup>2</sup>. Remarkably, the modulation efficiency improves at higher <i>I</i><sub>inj</sub>, attributed to the overpopulation of subthermal magnons and their increased sensitivity to current-induced spin-orbit torque. Our findings highlight the potential of the electrical manipulation of λ<sub>m</sub>, paving the way for the development of practical magnonic devices.