Altermagnetic nanotextures revealed in bulk MnTe
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arXiv
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2025
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| author | Yamamoto, Rikako Turnbull, Luke Alexander Schmidt, Marcus Filho, José Claudio Corsaletti Binger, Hayden Jeffrey Martínez, Marisel Di Pietro Weigand, Markus Finizio, Simone Prots, Yurii Ferguson, George Matthew Vool, Uri Wintz, Sebastian Donnelly, Claire |
| author_facet | Yamamoto, Rikako Turnbull, Luke Alexander Schmidt, Marcus Filho, José Claudio Corsaletti Binger, Hayden Jeffrey Martínez, Marisel Di Pietro Weigand, Markus Finizio, Simone Prots, Yurii Ferguson, George Matthew Vool, Uri Wintz, Sebastian Donnelly, Claire |
| contents | With many candidate altermagnetic materials, MnTe has emerged as one of the most promising systems, with growing experimental evidence for altermagnetic phenomena. So far, the majority of measurements have been performed on thin-films, or have involved surface measurements. However, the question of altermagnetic order in the bulk system - in the absence of substrate or surface effects - remains. Here we show evidence for bulk altermagnetism in single crystal MnTe, through spectroscopic X-ray microscopy. By performing nanoscale X-ray magnetic circular dichroic (XMCD) imaging in transmission on a 200 nm thick lamella, we observe domains and magnetic textures with a spectroscopic signature characteristic of altermagnetic order, thereby confirming the intrinsic nature of altermagnetism in MnTe. Quantitative analysis of the XMCD signal reveals an excellent agreement with predicted signals, establishing that the altermagnetic order exists throughout the thickness of the lamella and confirming the intrinsic, bulk nature of the state. With these results, we demonstrate that transmission XMCD spectroscopic imaging is a robust, quantitative technique to probe altermagnetic order, providing a means to probe individual altermagnetic domains within complex configurations. This ability to investigate, and characterise altermagnetic order in bulk crystals represents an important tool for the exploration of altermagnetism across a wide range of candidate materials, of key importance for the development of future technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_18597 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Altermagnetic nanotextures revealed in bulk MnTe Yamamoto, Rikako Turnbull, Luke Alexander Schmidt, Marcus Filho, José Claudio Corsaletti Binger, Hayden Jeffrey Martínez, Marisel Di Pietro Weigand, Markus Finizio, Simone Prots, Yurii Ferguson, George Matthew Vool, Uri Wintz, Sebastian Donnelly, Claire Materials Science With many candidate altermagnetic materials, MnTe has emerged as one of the most promising systems, with growing experimental evidence for altermagnetic phenomena. So far, the majority of measurements have been performed on thin-films, or have involved surface measurements. However, the question of altermagnetic order in the bulk system - in the absence of substrate or surface effects - remains. Here we show evidence for bulk altermagnetism in single crystal MnTe, through spectroscopic X-ray microscopy. By performing nanoscale X-ray magnetic circular dichroic (XMCD) imaging in transmission on a 200 nm thick lamella, we observe domains and magnetic textures with a spectroscopic signature characteristic of altermagnetic order, thereby confirming the intrinsic nature of altermagnetism in MnTe. Quantitative analysis of the XMCD signal reveals an excellent agreement with predicted signals, establishing that the altermagnetic order exists throughout the thickness of the lamella and confirming the intrinsic, bulk nature of the state. With these results, we demonstrate that transmission XMCD spectroscopic imaging is a robust, quantitative technique to probe altermagnetic order, providing a means to probe individual altermagnetic domains within complex configurations. This ability to investigate, and characterise altermagnetic order in bulk crystals represents an important tool for the exploration of altermagnetism across a wide range of candidate materials, of key importance for the development of future technologies. |
| title | Altermagnetic nanotextures revealed in bulk MnTe |
| topic | Materials Science |
| url | https://arxiv.org/abs/2502.18597 |