Magneto-optical imaging of macroscopic altermagnetic domains in MnTe
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866913038268891136 |
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| author | Watanabe, Gakuto Yamane, Soichiro Maki, Ryotaro Ikeda, Atsutoshi Kirikoshi, Akimitsu Otsuki, Junya Aoyama, Takuya Ohgushi, Kenya Yonezawa, Shingo |
| author_facet | Watanabe, Gakuto Yamane, Soichiro Maki, Ryotaro Ikeda, Atsutoshi Kirikoshi, Akimitsu Otsuki, Junya Aoyama, Takuya Ohgushi, Kenya Yonezawa, Shingo |
| contents | Altermagnets are a new class of magnets accompanying global time-reversal symmetry breaking (TRSB) without net magnetization. The TRSB results in formation of novel altermagnetic domains. Features of altermagnetic domains, in particular their responses to external stimuli, are essentially important but yet unexplored. Here, we report visualization of bulk altermagnetic domains in MnTe based on scanning magneto-optical Kerr-effect microscopy using telecom infrared wavelength. We found two distinct TRSB domains with large Kerr rotations that do not scale with its tiny bulk magnetization. We also revealed controllability and stability of domains against magnetic or thermal perturbations. Our first observation of altermagnetic domains using a laboratory-scale simple optical technique showing their movable nature provide firm bases for future fundamental and application studies of altermagnets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_14947 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Magneto-optical imaging of macroscopic altermagnetic domains in MnTe Watanabe, Gakuto Yamane, Soichiro Maki, Ryotaro Ikeda, Atsutoshi Kirikoshi, Akimitsu Otsuki, Junya Aoyama, Takuya Ohgushi, Kenya Yonezawa, Shingo Materials Science Other Condensed Matter Strongly Correlated Electrons Applied Physics Optics Altermagnets are a new class of magnets accompanying global time-reversal symmetry breaking (TRSB) without net magnetization. The TRSB results in formation of novel altermagnetic domains. Features of altermagnetic domains, in particular their responses to external stimuli, are essentially important but yet unexplored. Here, we report visualization of bulk altermagnetic domains in MnTe based on scanning magneto-optical Kerr-effect microscopy using telecom infrared wavelength. We found two distinct TRSB domains with large Kerr rotations that do not scale with its tiny bulk magnetization. We also revealed controllability and stability of domains against magnetic or thermal perturbations. Our first observation of altermagnetic domains using a laboratory-scale simple optical technique showing their movable nature provide firm bases for future fundamental and application studies of altermagnets. |
| title | Magneto-optical imaging of macroscopic altermagnetic domains in MnTe |
| topic | Materials Science Other Condensed Matter Strongly Correlated Electrons Applied Physics Optics |
| url | https://arxiv.org/abs/2604.14947 |