Imaging non-collinear antiferromagnetic textures via single spin relaxometry
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2020
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| _version_ | 1866909163531010048 |
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| author | Finco, Aurore Haykal, Angela Tanos, Rana Fabre, Florentin Chouaieb, Saddem Akhtar, Waseem Robert-Philip, Isabelle Legrand, William Ajejas, Fernando Bouzehouane, Karim Reyren, Nicolas Devolder, Thibaut Adam, Jean-Paul Kim, Joo-Von Cros, Vincent Jacques, Vincent |
| author_facet | Finco, Aurore Haykal, Angela Tanos, Rana Fabre, Florentin Chouaieb, Saddem Akhtar, Waseem Robert-Philip, Isabelle Legrand, William Ajejas, Fernando Bouzehouane, Karim Reyren, Nicolas Devolder, Thibaut Adam, Jean-Paul Kim, Joo-Von Cros, Vincent Jacques, Vincent |
| contents | Antiferromagnetic materials are promising platforms for next-generation spintronics owing to their fast dynamics and high robustness against parasitic magnetic fields. However, nanoscale imaging of the magnetic order in such materials with zero net magnetization remains a major experimental challenge. Here we show that non-collinear antiferromagnetic spin textures can be imaged by probing the magnetic noise they locally produce via thermal populations of magnons. To this end, we perform nanoscale, all-optical relaxometry with a scanning quantum sensor based on a single nitrogen-vacancy (NV) defect in diamond. Magnetic noise is detected through an increase of the spin relaxation rate of the NV defect, which results in an overall reduction of its photoluminescence signal under continuous laser illumination. As a proof-of-concept, the efficiency of the method is demonstrated by imaging various spin textures in synthetic antiferromagnets, including domain walls, spin spirals and antiferromagnetic skyrmions. This imaging procedure could be extended to a large class of intrinsic antiferromagnets and opens up new opportunities for studying the physics of localized spin wave modes for magnonics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2006_13130 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | Imaging non-collinear antiferromagnetic textures via single spin relaxometry Finco, Aurore Haykal, Angela Tanos, Rana Fabre, Florentin Chouaieb, Saddem Akhtar, Waseem Robert-Philip, Isabelle Legrand, William Ajejas, Fernando Bouzehouane, Karim Reyren, Nicolas Devolder, Thibaut Adam, Jean-Paul Kim, Joo-Von Cros, Vincent Jacques, Vincent Mesoscale and Nanoscale Physics Antiferromagnetic materials are promising platforms for next-generation spintronics owing to their fast dynamics and high robustness against parasitic magnetic fields. However, nanoscale imaging of the magnetic order in such materials with zero net magnetization remains a major experimental challenge. Here we show that non-collinear antiferromagnetic spin textures can be imaged by probing the magnetic noise they locally produce via thermal populations of magnons. To this end, we perform nanoscale, all-optical relaxometry with a scanning quantum sensor based on a single nitrogen-vacancy (NV) defect in diamond. Magnetic noise is detected through an increase of the spin relaxation rate of the NV defect, which results in an overall reduction of its photoluminescence signal under continuous laser illumination. As a proof-of-concept, the efficiency of the method is demonstrated by imaging various spin textures in synthetic antiferromagnets, including domain walls, spin spirals and antiferromagnetic skyrmions. This imaging procedure could be extended to a large class of intrinsic antiferromagnets and opens up new opportunities for studying the physics of localized spin wave modes for magnonics. |
| title | Imaging non-collinear antiferromagnetic textures via single spin relaxometry |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2006.13130 |