Abstract
We study spin-dependent transport theoretically in structures with a barrier composed of magnesium oxide and ferromagnetic electrodes with a noncollinear orientation of magnetizations in the ferromagnetic layers. We consider the effects of tunnel magnetoresistance and of the spin torque in the two-band s-d model using the Keldysh technique of nonequilibrium Green’s functions with the s-d hybridization taken into account. We investigate the role of a chromium layer as an additional spin filter for s electrons and the possibility of increasing the effects of tunnel magnetoresistance and of the spin torque for the resonance tunneling in the five-layer structure Fe|Cr|Fe|MgO|Fe.
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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 168, No. 3, pp. 428–440, September, 2011.
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Vedyaev, A.V., Kotel’nikova, O.A., Lystzeva, L.Y. et al. Spin-polarized transport in structures with tunnel barriers. Theor Math Phys 168, 1225–1235 (2011). https://doi.org/10.1007/s11232-011-0100-4
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DOI: https://doi.org/10.1007/s11232-011-0100-4