| Autor: |
Zhaoqiang Bai, Lei Shen, Yongqing Cai, Qingyun Wu, Minggang Zeng, Guchang Han, Yuan Ping Feng |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
New Journal of Physics, Vol 16, Iss 10, p 103033 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
1367-2630 |
| DOI: |
10.1088/1367-2630/16/10/103033 |
| Popis: |
Employing density functional theory combined with the non-equilibrium Greenʼs function formalism, we systematically investigate the structural, magnetic and magnetoelectric properties of the Co _2 FeAl(CFA)/MgO interface, as well as the spin-dependent transport characteristics of the CFA/MgO/CFA perpendicular magnetic tunnel junctions (p-MTJs). We find that the structure of the CFA/MgO interface with the oxygen-top FeAl termination has high thermal stability, which is protected by the thermodynamic equilibrium limit. Furthermore, this structure is found to have perpendicular magnetocrystalline anisotropy (MCA). Giant electric-field-assisted modifications of this interfacial MCA through magnetoelectric coupling are demonstrated with an MCA coefficient of up to 10 ^−7 erg V ^−1 cm. In addition, our non-collinear spin transport calculations of the CFA/MgO/CFA p-MTJ predict a good magnetoresistance performance of the device. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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