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Coherent magnon-induced domain-wall motion in a magnetic insulator channel
Nature Nanotechnology ( IF 38.3 ) Pub Date : 2023-06-01 , DOI: 10.1038/s41565-023-01406-2
Yabin Fan 1 , Miela J Gross 2 , Takian Fakhrul 1 , Joseph Finley 2, 3 , Justin T Hou 2, 3 , Steven Ngo 1 , Luqiao Liu 2, 3 , Caroline A Ross 1
Affiliation  

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.



中文翻译:

磁绝缘体通道中相干磁振子引起的畴壁运动

推进自旋波器件的发展需要高质量的低阻尼磁性材料,其中磁振子自旋电流可以有效地传播并与局部磁性纹理有效地相互作用。在这里,我们证明磁畴壁可以调制 Bi 掺杂钇铁石榴石垂直磁化通道中的自旋波传输。相反,我们证明磁振子自旋流可以通过磁振子自旋转移力矩驱动Bi掺杂钇铁石榴石通道器件中的畴壁运动。通过短至 1 ns 的射频脉冲激发的磁振子自旋电流,在零外加磁场下,磁畴壁可以可靠地移动 15–20 µm 的距离。驱动畴壁运动所需的能量比金属系统报告的能量小几个数量级。这些结果有利于低开关能量磁振子器件和电路,其中磁域可以通过磁通道内流动的磁振子自旋电流有效地重新配置。

更新日期:2023-06-02
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