Please use this identifier to cite or link to this item: https://doi.org/10.1088/1367-2630/16/10/103033
Title: Magnetocrystalline anisotropy and its electric-field-assisted switching of Heusler-compound-based perpendicular magnetic tunnel junctions
Authors: Bai Z. 
Shen L. 
Cai Y. 
Wu Q.
Zeng M. 
Han G. 
Feng Y.P. 
Keywords: Anisotropy
Density functional theory
Electric fields
Magnetic anisotropy
Magnetic logic devices
Magnetism
Magnetocrystalline anisotropy
Magnetoelectric effects
Tunnel junctions
Heusler alloys
Magnetic crystalline anisotropy
Magnetic tunnel junction
Magnetoelectric couplings
Magnetoelectric properties
Non-equilibrium greens functions
Spin transport
Thermodynamic equilibria
Magnetic devices
Issue Date: 2014
Publisher: Institute of Physics Publishing
Citation: Bai Z., Shen L., Cai Y., Wu Q., Zeng M., Han G., Feng Y.P. (2014). Magnetocrystalline anisotropy and its electric-field-assisted switching of Heusler-compound-based perpendicular magnetic tunnel junctions. New Journal of Physics 16 : 103033. ScholarBank@NUS Repository. https://doi.org/10.1088/1367-2630/16/10/103033
Abstract: Employing density functional theory combined with the non-equilibrium Greens 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 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. © 2014 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Source Title: New Journal of Physics
URI: https://scholarbank.nus.edu.sg/handle/10635/175302
ISSN: 1367-2630
DOI: 10.1088/1367-2630/16/10/103033
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