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Updated: Nov 18, 2025
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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
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Imaging non-collinear antiferromagnetic textures via single spin relaxometry.
Aurore Finco1, Angela Haykal1, Rana Tanos1
1Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095, Montpellier, France.
Nature Communications
|February 4, 2021
Summary
Researchers developed a new method to image antiferromagnetic spin textures using magnetic noise from magnons. This technique, utilizing a scanning quantum sensor, overcomes challenges in visualizing materials for advanced spintronics.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Sensing
Background:
- Antiferromagnetic materials are crucial for next-generation spintronics due to their speed and magnetic field resilience.
- Directly imaging nanoscale magnetic order in antiferromagnets, which have zero net magnetization, presents significant experimental hurdles.
Purpose of the Study:
- To demonstrate a novel method for imaging non-collinear antiferromagnetic spin textures at the nanoscale.
- To overcome the challenge of visualizing materials with zero net magnetization for spintronic applications.
Main Methods:
- Utilized nanoscale all-optical relaxometry with a scanning quantum sensor based on a nitrogen-vacancy (NV) defect in diamond.
- Detected magnetic noise generated by thermal magnon populations, which increases the NV defect's spin relaxation rate.
- Monitored changes in the NV defect's photoluminescence signal under continuous laser illumination to quantify magnetic noise.
Main Results:
- Successfully imaged various spin textures, including domain walls, spin spirals, and antiferromagnetic skyrmions, in synthetic antiferromagnets.
- Demonstrated the sensitivity of the NV defect's spin relaxation rate to local magnetic noise produced by spin textures.
- Established a proof-of-concept for the efficacy of magnetic noise probing for antiferromagnetic imaging.
Conclusions:
- The developed magnetic noise imaging technique effectively visualizes nanoscale antiferromagnetic spin textures.
- This method offers a pathway for studying intrinsic antiferromagnets and localized spin wave modes for magnonics.
- Opens new avenues for research in antiferromagnetic spintronics and quantum sensing applications.
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