Abstract
The analytical treatment of electron transport processes in spintronics layered nanostructures is used to consider the specifics of electronic distribution function at short distances from the magnetic tunnel junction. It is shown that already in absence of external electrical field, an essential perturbation of the equilibrium Fermi distribution appears for the antiparallel magnetic configuration of electrodes, leading to reduced occupation of one of the spin subbands (minority for negative or majority for positive band dispersion). This effect can locally influence (respectively, enhance or reduce) the polarization of charge carriers and subsequently the magnetoresistance of the device.
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