Anomalous magnetotransport in a non-collinear correlated kagome ferromagnet MgMn6Sn6
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866910201835159552 |
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| author | Deb, Kakan Kanthal, Sourav Sau, Jyotirmoy Shekhar, Chandra Kumar, Manoranjan Gutmann, Matthias Sannigrahi, Jhuma Kumar, Nitesh |
| author_facet | Deb, Kakan Kanthal, Sourav Sau, Jyotirmoy Shekhar, Chandra Kumar, Manoranjan Gutmann, Matthias Sannigrahi, Jhuma Kumar, Nitesh |
| contents | Magnetic kagome metals provide a fertile platform for exploring unusual magnetotransport phenomena arising from the intricate interplay between electronic topology, electron correlations, and magnetic order. MgMn6Sn6 is a room-temperature kagome ferromagnet with strong in-plane magnetic anisotropy. Here, we report a combined study of single-crystal neutron diffraction (SCND) and magnetotransport properties of MgMn6Sn6, supported by first-principles calculations. Our SCND measurements reveal a non-collinear arrangement of Mn magnetic moments within the basal plane of the kagome bilayer. The Hall conductivity shows a substantial intrinsic contribution of approximately 0.29 e^2/h per kagome layer, which is nearly isotropic with respect to the field orientation. At low temperatures, the anomalous Hall conductivity develops a pronounced anisotropic extrinsic component, highlighting the directional sensitivity of scattering processes. The significantly large value of the Sommerfeld coefficient, in the absence of f-electrons, underscores enhanced electron correlation. Therefore, the non-collinear kagome ferromagnet MgMn6Sn6 is a promising candidate for studying the effects of electron correlation on magnetotransport properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_07904 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Anomalous magnetotransport in a non-collinear correlated kagome ferromagnet MgMn6Sn6 Deb, Kakan Kanthal, Sourav Sau, Jyotirmoy Shekhar, Chandra Kumar, Manoranjan Gutmann, Matthias Sannigrahi, Jhuma Kumar, Nitesh Materials Science Magnetic kagome metals provide a fertile platform for exploring unusual magnetotransport phenomena arising from the intricate interplay between electronic topology, electron correlations, and magnetic order. MgMn6Sn6 is a room-temperature kagome ferromagnet with strong in-plane magnetic anisotropy. Here, we report a combined study of single-crystal neutron diffraction (SCND) and magnetotransport properties of MgMn6Sn6, supported by first-principles calculations. Our SCND measurements reveal a non-collinear arrangement of Mn magnetic moments within the basal plane of the kagome bilayer. The Hall conductivity shows a substantial intrinsic contribution of approximately 0.29 e^2/h per kagome layer, which is nearly isotropic with respect to the field orientation. At low temperatures, the anomalous Hall conductivity develops a pronounced anisotropic extrinsic component, highlighting the directional sensitivity of scattering processes. The significantly large value of the Sommerfeld coefficient, in the absence of f-electrons, underscores enhanced electron correlation. Therefore, the non-collinear kagome ferromagnet MgMn6Sn6 is a promising candidate for studying the effects of electron correlation on magnetotransport properties. |
| title | Anomalous magnetotransport in a non-collinear correlated kagome ferromagnet MgMn6Sn6 |
| topic | Materials Science |
| url | https://arxiv.org/abs/2605.07904 |