| Thickness effect on magnetocrystalline anisotropy of MnPt(0 0 1) film | |||||
| 작성자 | 김** | 작성일 | 2019-07-29 | 조회수 | 332 |
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Journal Article published Dec 2018 in Journal of Magnetism and Magnetic Materials volume 467 on pages 69 to 73
Research funded by National Research Foundation of Korea (2018R1A4A10206962017R1D1A1B04033941)
AbstractWe 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. |
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