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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Accesso online: | https://arxiv.org/abs/2412.02812 |
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| _version_ | 1866915224309727232 |
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| author | Peterson, S. F. Idzerda, Y. U. |
| author_facet | Peterson, S. F. Idzerda, Y. U. |
| contents | Thin-films of bct Co$_{1-x}$Mn$_x$ grown by molecular beam epitaxy on MgO(001) were measured to have an enhanced atomic magnetic moment of $2.52 \pm 0.07$ $μ_\text{B}/\text{atom}$ beyond the pinnacle of the Slater-Pauling curve for Fe$_{1-x}$Co$_{x}$ with a moment of $2.42$ $μ_\text{B}/\text{atom}$. The compositional variation of the average total moment for thin-film bct Co$_{1-x}$Mn$_x$ alloys is in stark contrast to the historical measurements of bulk fcc Co$_{1-x}$Mn$_x$. These GGA calculations reveal that significant improvements of this ferromagnetic forced bct phase on MgO(001) are possible via substrate selection. For example, bct Co$_{1-x}$Mn$_x$ films on MgO(001) are calculated to have lower atomic moments than those on substrates with smaller lattice constants such as GaAs(001), BaTiO$_3$(110), and SrTiO$_3$(110) which is predicted to increase the average atomic moment up to $2.61$ $μ_\text{B}/\text{atom}$ and lead to increased structural stability and therefore thicker film growths. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_02812 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Structural and Magnetic Properties of Co-rich bct CoMn Films Peterson, S. F. Idzerda, Y. U. Materials Science Computational Physics Thin-films of bct Co$_{1-x}$Mn$_x$ grown by molecular beam epitaxy on MgO(001) were measured to have an enhanced atomic magnetic moment of $2.52 \pm 0.07$ $μ_\text{B}/\text{atom}$ beyond the pinnacle of the Slater-Pauling curve for Fe$_{1-x}$Co$_{x}$ with a moment of $2.42$ $μ_\text{B}/\text{atom}$. The compositional variation of the average total moment for thin-film bct Co$_{1-x}$Mn$_x$ alloys is in stark contrast to the historical measurements of bulk fcc Co$_{1-x}$Mn$_x$. These GGA calculations reveal that significant improvements of this ferromagnetic forced bct phase on MgO(001) are possible via substrate selection. For example, bct Co$_{1-x}$Mn$_x$ films on MgO(001) are calculated to have lower atomic moments than those on substrates with smaller lattice constants such as GaAs(001), BaTiO$_3$(110), and SrTiO$_3$(110) which is predicted to increase the average atomic moment up to $2.61$ $μ_\text{B}/\text{atom}$ and lead to increased structural stability and therefore thicker film growths. |
| title | Structural and Magnetic Properties of Co-rich bct CoMn Films |
| topic | Materials Science Computational Physics |
| url | https://arxiv.org/abs/2412.02812 |