First-Principles Prediction of Skyrmionic Phase Behavior in GdFe2 Films Capped by 4d and 5d Transition Metals
| Autor: | Dao Phoung, Xiao Zheng, Andreas Danilo, Soyoung Jekal |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Skyrmion
Dzyaloshinskii–Moriya interaction Exchange energy Magnetic anisotropy magnetic anisotropy Materials science Condensed matter physics lcsh:T general_materials_science Exchange interaction lcsh:Technology lcsh:QC1-999 lcsh:Chemistry skyrmion lcsh:Biology (General) lcsh:QD1-999 Transition metal lcsh:TA1-2040 Phase (matter) Condensed Matter::Strongly Correlated Electrons lcsh:Engineering (General). Civil engineering (General) lcsh:QH301-705.5 lcsh:Physics exchange energy |
| Zdroj: | Applied Sciences Volume 9 Issue 4 Applied Sciences, 9 (4) Applied Sciences, Vol 9, Iss 4, p 630 (2019) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app9040630 |
| Popis: | In atomic GdFe 2 films capped by 4d and 5d transition metals, we show that skyrmions with diameters smaller than 12 nm can emerge. The Dzyaloshinskii&ndash Moriya interaction (DMI), exchange energy, and the magnetocrystalline anisotropy (MCA) energy were investigated based on density functional theory. Since DMI and MCA are caused by spin&ndash orbit coupling (SOC), they are increased with 5d capping layers which exhibit strong SOC strength. We discover a skyrmion phase by using atomistic spin dynamic simulations at small magnetic fields of &sim 1 T. In addition, a ground state that a spin spiral phase is remained even at zero magnetic field for both films with 4d and 5d capping layers. |
| Databáze: | OpenAIRE |
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