Propagation length of antiferromagnetic magnons governed by domain configurations.
Propagation length of antiferromagnetic magnons governed by domain configurations.
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DOI：
10.1021/acs.nanolett.9b03837
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发表时间：
2019-12
期刊：
影响因子：
10.8
通讯作者：
A. Ross;R. Lebrun;O. Gomonay;D. Grave;A. Kay;L. Baldrati;S. Becker;A. Qaiumzadeh;Camilo Ulloa-Camilo
中科院分区：
文献类型：
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作者：
A. Ross;R. Lebrun;O. Gomonay;D. Grave;A. Kay;L. Baldrati;S. Becker;A. Qaiumzadeh;Camilo Ulloa-Camilo
反铁磁材料的补偿磁序和特性，太赫兹频率使它们成为开发一类新的鲁棒超快速自旋电子器件的有希望的候选者。对薄膜中反铁磁自旋波的操纵有望导致新的奇异现象，如自旋超流动性，这需要自旋波在薄膜中有效传播。然而，迄今为止，在薄膜中报道的衰减长度仅限于几纳米。在这项工作中，我们在具有大磁畴的绝缘反铁磁赤铁矿薄膜中实现了在微米距离上的有效自旋波传播，同时在多畴薄膜中证明了更短的衰减长度。通过输运和磁成像，我们得出了磁畴结构和畴壁自旋波散射对输运的影响。我们通过场周期训练调整域配置来操纵自旋输运。对于合适的晶体取向，零场自旋输运可以在微米范围内实现，这是器件集成所需要的。
The compensated magnetic order and characteristic, terahertz frequencies of antiferromagnetic materials makes them promising candidates to develop a new class of robust, ultra-fast spintronic devices. The manipulation of antiferromagnetic spin-waves in thin films is anticipated to lead to new exotic phenomena such as spin-superfluidity, requiring an efficient propagation of spin-waves in thin films. However, the reported decay length in thin films has so far been limited to a few nanometers. In this work, we achieve efficient spin-wave propagation, over micrometer distances, in thin films of the insulating antiferromagnet hematite with large magnetic domains whilst evidencing much shorter attenuation lengths in multidomain thin films. Through transport and magnetic imaging, we conclude on the role of the magnetic domain structure and spin-wave scattering at domain walls to govern the transport. We manipulate the spin transport by tailoring the domain configuration through field cycle training. For the appropriate crystalline orientation, zero-field spin-transport is achieved across micrometers, as required for device integration.