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  • Title: Coherent magnon-induced domain-wall motion in a magnetic insulator channel.
    Author: Fan Y, Gross MJ, Fakhrul T, Finley J, Hou JT, Ngo S, Liu L, Ross CA.
    Journal: Nat Nanotechnol; 2023 Sep; 18(9):1000-1004. PubMed ID: 37264089.
    Abstract:
    Advancing the development of spin-wave devices requires high-quality low-damping magnetic materials where magnon spin currents can efficiently propagate and effectively interact with local magnetic textures. Here we show that magnetic domain walls can modulate spin-wave transport in perpendicularly magnetized channels of Bi-doped yttrium iron garnet. Conversely, we demonstrate that the magnon spin current can drive domain-wall motion in the Bi-doped yttrium iron garnet channel device by means of magnon spin-transfer torque. The domain wall can be reliably moved over 15-20 µm distances at zero applied magnetic field by a magnon spin current excited by a radio-frequency pulse as short as 1 ns. The required energy for driving the domain-wall motion is orders of magnitude smaller than those reported for metallic systems. These results facilitate low-switching-energy magnonic devices and circuits where magnetic domains can be efficiently reconfigured by magnon spin currents flowing within magnetic channels.
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