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反铁磁体中的原子级尖锐畴壁。

Atomically sharp domain walls in an antiferromagnet.

作者信息

Krizek Filip, Reimers Sonka, Kašpar Zdeněk, Marmodoro Alberto, Michalička Jan, Man Ondřej, Edström Alexander, Amin Oliver J, Edmonds Kevin W, Campion Richard P, Maccherozzi Francesco, Dhesi Samjeet S, Zubáč Jan, Kriegner Dominik, Carbone Dina, Železný Jakub, Výborný Karel, Olejník Kamil, Novák Vít, Rusz Jan, Idrobo Juan-Carlos, Wadley Peter, Jungwirth Tomas

机构信息

Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10, 162 00 Praha 6, Czech Republic.

School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK.

出版信息

Sci Adv. 2022 Apr;8(13):eabn3535. doi: 10.1126/sciadv.abn3535. Epub 2022 Mar 30.

DOI:10.1126/sciadv.abn3535
PMID:35353557
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8967221/
Abstract

The interest in understanding scaling limits of magnetic textures such as domain walls spans the entire field of magnetism from its physical fundamentals to applications in information technologies. Here, we explore antiferromagnetic CuMnAs in which imaging by x-ray photoemission reveals the presence of magnetic textures down to nanoscale, reaching the detection limit of this established microscopy in antiferromagnets. We achieve atomic resolution by using differential phase-contrast imaging within aberration-corrected scanning transmission electron microscopy. We identify abrupt domain walls in the antiferromagnetic film corresponding to the Néel order reversal between two neighboring atomic planes. Our work stimulates research of magnetic textures at the ultimate atomic scale and sheds light on electrical and ultrafast optical antiferromagnetic devices with magnetic field-insensitive neuromorphic functionalities.

摘要

对理解诸如畴壁等磁织构的标度极限的兴趣,涵盖了从物理基础到信息技术应用的整个磁学领域。在此,我们研究反铁磁体CuMnAs,其中通过X射线光电子能谱成像揭示了直至纳米尺度的磁织构的存在,达到了这种已确立的反铁磁体显微镜的检测极限。我们通过在像差校正扫描透射电子显微镜中使用差分相衬成像实现了原子分辨率。我们在反铁磁薄膜中识别出与两个相邻原子平面之间的奈尔序反转相对应的陡峭畴壁。我们的工作激发了在最终原子尺度上对磁织构的研究,并为具有磁场不敏感神经形态功能的电和超快光学反铁磁器件提供了启示。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e86/8967221/0d3194aa277b/sciadv.abn3535-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e86/8967221/0f42bfdb6765/sciadv.abn3535-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e86/8967221/854e211e6547/sciadv.abn3535-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e86/8967221/c917b278f645/sciadv.abn3535-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e86/8967221/0d3194aa277b/sciadv.abn3535-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e86/8967221/0f42bfdb6765/sciadv.abn3535-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e86/8967221/854e211e6547/sciadv.abn3535-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e86/8967221/c917b278f645/sciadv.abn3535-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6e86/8967221/0d3194aa277b/sciadv.abn3535-f4.jpg

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