Thickness effect on magnetocrystalline anisotropy of MnPt(0 0 1) film
| Autor: | Dorj Odkhuu, Qurat-ul-ain, Do Duc Cuong, Soon Cheol Hong, Sonny H. Rhim |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Condensed matter physics Heisenberg model Ab initio 02 engineering and technology Electronic structure Substrate (electronics) 021001 nanoscience & nanotechnology Condensed Matter Physics Magnetocrystalline anisotropy 01 natural sciences Electronic Optical and Magnetic Materials 0103 physical sciences Monolayer Thin film 010306 general physics 0210 nano-technology Ground state |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 467:69-73 |
| ISSN: | 0304-8853 |
| Popis: | We investigated the magnetocrystalline anisotropy (MCA) of MnPt(0 0 1) film and MnPt/MgO(0 0 1) using ab initio electronic structure calculations. We found that the magnetic ground state of the MnPt film strongly depends on thickness (n). In bulk and in film with n ≥ 7 monolayers; AFM-II is the magnetic ground state. However, as the film thickness reduces, the magnetic ground state shifts from AFM-II to AFM-III. We employ layer-by-layer Heisenberg model to explain thickness dependent ground state transition. AFM-III state in the Mn-terminated film shows large perpendicular MCA(PMCA), which further enhances on a MgO(0 0 1) substrate. We conclude that the interface plays a key role for the enhancement of PMCA on the substrate. |
| Databáze: | OpenAIRE |
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