The two-bands model of the magnetic tunnel junctions in the Fe/Cr/MgO/Fe structure

Details The two-bands model of the magnetic tunnel junctions in the Fe/Cr/MgO/Fe structure The two-bands model of the magnetic tunnel junctions in the Fe/Cr/MgO/Fe structure

2009-10-16

arxiv.org/abs/0910.3046v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

MS Word 2007, 10 pages, 3 figures

Scientific paper

In this paper we present theoretical studies of spin dependent transport in Fe/Cr/MgO/Fe tunnel junctions with non-collinear alignment of magnetizations of metallic layers comprising these MTJs. Calculations are performed with use of non-equilibrium Green function technique in the framework of Keldysh formalism. WKB approximation is used for wave and Green functions in the trapezoidal barrier region under applied voltage. Electronic structure of ferromagnetic electrodes is modeled with two bands model, i.e. with majority s-electrons and minority d-holes. Furthermore, we introduce s-d hybridization by calculating the corresponding perturbation corrections for the wave and Green functions.

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