Interlayer and interfacial Dzyaloshinskii-Moriya interaction in magnetic trilayers: first-principles calculations
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| Format: | Preprint |
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2024
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| _version_ | 1866929477981831168 |
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| author | Matthies, Tim Rózsa, Levente Szunyogh, László Wiesendanger, Roland Vedmedenko, Elena Y. |
| author_facet | Matthies, Tim Rózsa, Levente Szunyogh, László Wiesendanger, Roland Vedmedenko, Elena Y. |
| contents | We determine the Dzyaloshinskii-Moriya interaction within and between two magnetic cobalt layers separated by a non-magnetic spacer through ab initio calculations. We investigate different materials for the non-magnetic layer, focusing on the experimentally realized Co/Ag/Co system. We laterally shift the atoms in the non-magnetic layer to achieve the symmetry breaking required for the interlayer Dzyaloshinskii-Moriya interaction. We compare the resulting interactions with the Lévy-Fert model and observe a good overall agreement between the model and the ab initio calculations for the dependence on the atomic positions. Additionally, we derive a formula for the strength of the interlayer isotropic exchange interaction depending on the position of the atoms in the non-magnetic layer and compare it to the first-principles results. We investigate the limitations of the Lévy-Fert model by turning off the spin-orbit coupling separately on the non-magnetic and magnetic atoms and by studying the effect of band filling. Our work advances the understanding of the microscopic mechanisms of the interlayer Dzyaloshinskii-Moriya interaction and gives insight into possible new material combinations with strong interlayer Dzyaloshinskii-Moriya interaction. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2408_15734 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Interlayer and interfacial Dzyaloshinskii-Moriya interaction in magnetic trilayers: first-principles calculations Matthies, Tim Rózsa, Levente Szunyogh, László Wiesendanger, Roland Vedmedenko, Elena Y. Materials Science We determine the Dzyaloshinskii-Moriya interaction within and between two magnetic cobalt layers separated by a non-magnetic spacer through ab initio calculations. We investigate different materials for the non-magnetic layer, focusing on the experimentally realized Co/Ag/Co system. We laterally shift the atoms in the non-magnetic layer to achieve the symmetry breaking required for the interlayer Dzyaloshinskii-Moriya interaction. We compare the resulting interactions with the Lévy-Fert model and observe a good overall agreement between the model and the ab initio calculations for the dependence on the atomic positions. Additionally, we derive a formula for the strength of the interlayer isotropic exchange interaction depending on the position of the atoms in the non-magnetic layer and compare it to the first-principles results. We investigate the limitations of the Lévy-Fert model by turning off the spin-orbit coupling separately on the non-magnetic and magnetic atoms and by studying the effect of band filling. Our work advances the understanding of the microscopic mechanisms of the interlayer Dzyaloshinskii-Moriya interaction and gives insight into possible new material combinations with strong interlayer Dzyaloshinskii-Moriya interaction. |
| title | Interlayer and interfacial Dzyaloshinskii-Moriya interaction in magnetic trilayers: first-principles calculations |
| topic | Materials Science |
| url | https://arxiv.org/abs/2408.15734 |