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arXiv · 2212.01408

Coherent magnon-induced domain wall motion in a magnetic insulator channel

Yabin Fan·Miela J. Gross·Takian Fakhrul·Joseph Finley·Justin T. Hou·Luqiao Liu·Caroline A. Ross
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Abstract

Advancing the development of spin-wave devices requires high-quality low-damping magnetic materials where magnon spin currents can propagate efficiently and interact effectively with local magnetic textures. We show that magnetic domain walls (DW) can modulate spin-wave transport in perpendicularly magnetized channels of Bi-doped yttrium-iron-garnet (BiYIG). Conversely, we demonstrate that the magnon spin current can drive DW motion in the BiYIG channel device by means of magnon spin-transfer torque. The DW can be reliably moved over 15 um distances at zero applied magnetic field by a magnon spin current excited by an RF pulse as short as 1 ns. The required energy for driving DW 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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Yabin Fan, Miela J. Gross, Takian Fakhrul, Joseph Finley, Justin T. Hou, Luqiao Liu, Caroline A. Ross. 2022-12-02. Coherent magnon-induced domain wall motion in a magnetic insulator channel. https://arxiv.org/abs/2212.01408

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