Year: 2026
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide 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 m ) has not been reported. In this work, we demonstrate electrical control of λ m in three-terminal Pt/YIG devices, where injector-to-detector distance and modulator widths are systematically varied. We observe that λ m can be effectively tuned by the modulation current, with strong dependence on the injection current ( I inj ). At low I inj, λ m increases from 0.84 to 1.8 μm under a modulation current density of 5.5 × 10 7 A/cm 2 . Remarkably, the modulation efficiency improves at higher I inj, 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 m, paving the way for the development of practical magnonic devices.
Source: Nano Letters
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
OpenAlex ID: W7125104735