| First-principles study of magnetization reorientation and large perpendicular magnetic anisotropy in CuFe2O4MgO heterostructures | |||||
| 작성자 | 김** | 작성일 | 2019-07-29 | 조회수 | 77 |
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Journal Article published 10 Sep 2018 in Physical Review B volume 98 issue 9
Research funded by National Research Foundation of Korea (2016M3D1A1027831) | Incheon National University (20170096)
AbstractHerein, using first-principles calculations we predict magnetization reorientation and large perpendicular magnetic anisotropy (PMA) in spinel Fe3O4/MgO heterostructure by replacing the octahedral Fe ions with Cu. The substitutional Cu2+ ions prefer the octahedral site within the xy-plane layer in an inverse spinel structure, which is associated with the Jahn-Teller tetragonal and xy-plane twisted distortions. While magnetization of Fe3O4/MgO is significantly reduced in CuFe2O4/MgO, the presence of the substitutional Cu2+ ions reorients magnetization from an in-plane to perpendicular magnetic anisotropy. More remarkably, PMA further increases gradually with the film thickness of CuFe2O4 layers in the CuFe2O4/MgO heterostructure. The underlying mechanism for this large PMA is the interplay of the spin-orbit-coupled Cu dxy?dx2?y2 states in the center layers and the Fe dz2?O pz hybridization at the interface. These findings point toward the feasibility of reducing magnetization and enhancing PMA in spinel structures for spintronics applications. |
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