中国科学技术大学自旋电子材料与器件实验室--自旋电子材料与器件实验室-- Li R, Riddiford L J, Chai Y, et al. A puzzling insensitivity of magnon spin diffusion to the presence of 180-degree domain walls[J]. Nature Communications, 2023, 14(1): 2393.

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Li R, Riddiford L J, Chai Y, et al. A puzzling insensitivity of magnon spin diffusion to the presence of 180-degree domain walls[J]. Nature Communications, 2023, 14(1): 2393.

发布时间：2024-04-23点击次数：

发表刊物：
Nature Communications
摘要：
We present room-temperature measurements of magnon spin diffusion in epitaxial ferrimagnetic insulator MgAl0.5Fe1.5O4 (MAFO) thin films near zero applied magnetic field where the sample forms a multi-domain state. Due to a weak uniaxial magnetic anisotropy, the domains are separated primarily by 180° domain walls. We find, surprisingly, that the presence of the domain walls has very little effect on the spin diffusion – nonlocal spin transport signals in the multi-domain state retain at least 95% of the maximum signal strength measured for the spatially-uniform magnetic state, over distances at least five times the typical domain size. This result is in conflict with simple models of interactions between magnons and static domain walls, which predict that the spin polarization carried by the magnons reverses upon passage through a 180° domain wall.
论文类型：
期刊论文
卷号：
14
期号：
1
页面范围：
2393
是否译文：
否
发表时间：
2023-04-26
发布期刊链接：
https://doi.org/10.1038/s41467-023-38095-3

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