Terahertz magneto-optical response in ferromagnetic Fe-Co-Al alloys
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
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2022
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| _version_ | 1866914767239643136 |
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| author | Lei, Ming Coh, Sinisa |
| author_facet | Lei, Ming Coh, Sinisa |
| contents | We study the magneto-optical properties of Fe-Co-Al ordered alloys in the terahertz range of frequencies. Using the standard Kubo-based approach to compute intrinsic part of the $σ_{xy}(ω)$ we find a strong dependence of $σ_{xy}$ on $ω$ in the terahertz range. For example, we find that below 10~THz Co$_3$Al has nearly constant $σ_{xy}$ and that above 10~THz it is reduced by about 50 times. Furthermore, we find a strong dependence of $σ_{xy}$ on the chemical composition. For example, we find that the addition of Al to Fe changes the sign of $σ_{xy}$, while the addition of Co to Fe leads to a nonmonotonic dependence of $σ_{xy}$ on Co concentration. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2202_05997 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Terahertz magneto-optical response in ferromagnetic Fe-Co-Al alloys Lei, Ming Coh, Sinisa Materials Science We study the magneto-optical properties of Fe-Co-Al ordered alloys in the terahertz range of frequencies. Using the standard Kubo-based approach to compute intrinsic part of the $σ_{xy}(ω)$ we find a strong dependence of $σ_{xy}$ on $ω$ in the terahertz range. For example, we find that below 10~THz Co$_3$Al has nearly constant $σ_{xy}$ and that above 10~THz it is reduced by about 50 times. Furthermore, we find a strong dependence of $σ_{xy}$ on the chemical composition. For example, we find that the addition of Al to Fe changes the sign of $σ_{xy}$, while the addition of Co to Fe leads to a nonmonotonic dependence of $σ_{xy}$ on Co concentration. |
| title | Terahertz magneto-optical response in ferromagnetic Fe-Co-Al alloys |
| topic | Materials Science |
| url | https://arxiv.org/abs/2202.05997 |