Optimizing $α''$-Fe$_{16}$N$_2$ as permanent magnet via alloying
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866918111822741504 |
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| author | Zhao, Bo Xie, Ruiwen Dirba, Imants Alff, Lambert Gutfleisch, Oliver Zhang, Hongbin |
| author_facet | Zhao, Bo Xie, Ruiwen Dirba, Imants Alff, Lambert Gutfleisch, Oliver Zhang, Hongbin |
| contents | Based on systematic first-principles calculations, we investigate the effects of 27 alloying elements on the intrinsic magnetic properties of Fe$_{16}$N$_2$, in order to further optimize its properties for permanent magnet applications. Analysis on the thermodynamic stabilities based on formation energy and distance to the convex hull reveals that 20 elements can be substituted into Fe$_{16}$N$_2$, where there is no strong site-preference upon doping. It is observed that all alloying elements can essentially reduce the saturation magnetization, whereas the magnetic anisotropy can be significantly modified. In terms of the Boltzmann-average intrinsic properties, we identify 8 elements as interesting candidates, with Co, Mo, and W as the most promising cases for further experimental validations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_01035 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optimizing $α''$-Fe$_{16}$N$_2$ as permanent magnet via alloying Zhao, Bo Xie, Ruiwen Dirba, Imants Alff, Lambert Gutfleisch, Oliver Zhang, Hongbin Materials Science Based on systematic first-principles calculations, we investigate the effects of 27 alloying elements on the intrinsic magnetic properties of Fe$_{16}$N$_2$, in order to further optimize its properties for permanent magnet applications. Analysis on the thermodynamic stabilities based on formation energy and distance to the convex hull reveals that 20 elements can be substituted into Fe$_{16}$N$_2$, where there is no strong site-preference upon doping. It is observed that all alloying elements can essentially reduce the saturation magnetization, whereas the magnetic anisotropy can be significantly modified. In terms of the Boltzmann-average intrinsic properties, we identify 8 elements as interesting candidates, with Co, Mo, and W as the most promising cases for further experimental validations. |
| title | Optimizing $α''$-Fe$_{16}$N$_2$ as permanent magnet via alloying |
| topic | Materials Science |
| url | https://arxiv.org/abs/2508.01035 |