Magnetocrystalline anisotropy and its electric-fieldassisted switching of Heusler-compound-based perpendicular magnetic tunnel junctions

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Magnetocrystalline anisotropy and its electric-fieldassisted switching of Heusler-compound-based perpendicular magnetic tunnel junctions
Title:
Magnetocrystalline anisotropy and its electric-fieldassisted switching of Heusler-compound-based perpendicular magnetic tunnel junctions
Other Titles:
New Journal of Physics
Keywords:
Publication Date:
20 October 2014
Citation:
New Journal of Physics 16 (2014) 103033
Abstract:
Employing density functional theory combined with the non-equilibrium Greenʼs function formalism, we systematically investigate the structural, magnetic and magnetoelectric properties of the Co2FeAl(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 ergV−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.
License type:
http://creativecommons.org/licenses/by/4.0/
Funding Info:
Description:
ISSN:
1367-2630
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