Core structure of dislocations in ordered ferromagnetic FeCo
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910899302825984 |
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| author | Egorov, Aleksei Kraych, Antoine Mrovec, Matous Drautz, Ralf Hammerschmidt, Thomas |
| author_facet | Egorov, Aleksei Kraych, Antoine Mrovec, Matous Drautz, Ralf Hammerschmidt, Thomas |
| contents | We elucidated the core structure of screw dislocations in ordered B2 FeCo using a recent magnetic bond-order potential (BOP) [Egorov et al., Phys. Rev. Mater. 7, 044403 (2023)]. We corroborated that dislocations in B2 FeCo exist in pairs separated by antiphase boundaries. The equilibrium separation is about 50 A, which demands large-scale atomistic simulations - inaccessible for density functional theory but attainable with BOP. We performed atomistic simulations of these separated dislocations with BOP and predicted that they reside in degenerate core structures. Also, dislocations induce changes in the local electronic structure and magnetic moments. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2402_10056 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Core structure of dislocations in ordered ferromagnetic FeCo Egorov, Aleksei Kraych, Antoine Mrovec, Matous Drautz, Ralf Hammerschmidt, Thomas Materials Science We elucidated the core structure of screw dislocations in ordered B2 FeCo using a recent magnetic bond-order potential (BOP) [Egorov et al., Phys. Rev. Mater. 7, 044403 (2023)]. We corroborated that dislocations in B2 FeCo exist in pairs separated by antiphase boundaries. The equilibrium separation is about 50 A, which demands large-scale atomistic simulations - inaccessible for density functional theory but attainable with BOP. We performed atomistic simulations of these separated dislocations with BOP and predicted that they reside in degenerate core structures. Also, dislocations induce changes in the local electronic structure and magnetic moments. |
| title | Core structure of dislocations in ordered ferromagnetic FeCo |
| topic | Materials Science |
| url | https://arxiv.org/abs/2402.10056 |