Real-space imaging of non-collinear antiferromagnetic order with a single-spin magnetometer - Laboratoire Charles Coulomb (L2C) Accéder directement au contenu
Article Dans Une Revue Nature Année : 2017

Real-space imaging of non-collinear antiferromagnetic order with a single-spin magnetometer

Saddem Chouaieb
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N. Jaouen
Vincent Jacques
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Résumé

Although ferromagnets have many applications, their large magnetization and the resulting energy cost for switching magnetic moments bring into question their suitability for reliable low-power spintronic devices. Non-collinear antiferromagnetic systems do not suffer from this problem, and often have extra functionalities: non-collinear spin order may break space- inversion symmetry and thus allow electric-field control of magnetism or may produce emergent spin–orbit effects that enable efficient spin–charge interconversion. To harness these traits for next-generation spintronics, the nanoscale control and imaging capabilities that are now routine for ferromagnets must be developed for antiferromagnetic systems. Here, using a non-invasive, scanning single-spin magnetometer based on a nitrogen–vacancy defect in diamond, we demonstrate real- space visualization of non-collinear antiferromagnetic order in a magnetic thin film at room temperature. We image the spin cycloid of a multiferroic bismuth ferrite (BiFeO3) thin film and extract a period of about 70 nanometres, consistent with values determined by macroscopic diffraction. In addition, we take advantage of the magnetoelectric coupling present in BiFeO$_3$ to manipulate the cycloid propagation direction by an electric field. Besides highlighting the potential of nitrogen–vacancy magnetometry for imaging complex antiferromagnetic orders at the nanoscale, these results demonstrate how BiFeO$_3$ can be used in the design of reconfigurable nanoscale spin textures.
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Dates et versions

hal-01632358 , version 1 (16-11-2020)

Identifiants

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Isabell Gross, W. Akhtar, V. Garcia, L. J. Martinez, Saddem Chouaieb, et al.. Real-space imaging of non-collinear antiferromagnetic order with a single-spin magnetometer. Nature, 2017, 549 (7671), pp.252-256. ⟨10.1038/nature23656⟩. ⟨hal-01632358⟩
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