dc.contributor.author Useinov, Arthur dc.contributor.author Kosel, Jürgen dc.date.accessioned 2015-08-04T07:01:01Z dc.date.available 2015-08-04T07:01:01Z dc.date.issued 2011-10 dc.identifier.citation Useinov, A., & Kosel, J. (2011). Spin Asymmetry Calculations of the $TMR\hbox{-}V$ Curves in Single and Double-Barrier Magnetic Tunnel Junctions. IEEE Transactions on Magnetics, 47(10), 2724–2727. doi:10.1109/tmag.2011.2153182 dc.identifier.issn 00189464 dc.identifier.doi 10.1109/TMAG.2011.2153182 dc.identifier.uri http://hdl.handle.net/10754/564439 dc.description.abstract Spin-polarization asymmetry is the key parameter in asymmetric voltage behavior (AVB) of the tunnel magnetoresistance (TMR) in magnetic tunnel junctions. In this paper, we study the value of the TMR as a function of the applied voltage Va in the single as well as double barrier magnetic tunnel junctions (SMTJ & DMTJ, which are constructed from CoFeB/MgO interfaces) and numerically estimate the possible difference of the TMR-V a curves for negative and positive voltages in the homojunctions. As a result, we found that AVB may help to determine the exact values of Fermi wave vectors for minority and majority conducting spin sub-bands. Moreover, significant asymmetry of the experimental TMR-Va curves, which arises due to different annealing regimes, is explained by different heights of the tunnel barriers and values of the spin asymmetry. The numerical TMR-V a data are in good agreement with experimental ones. © 2011 IEEE. dc.publisher Institute of Electrical and Electronics Engineers (IEEE) dc.subject Ballistic transport dc.subject magnetic tunnel junction dc.subject spin polarized transport dc.subject tunnel magnetoresistance dc.title Spin asymmetry calculations of the TMR-V curves in single and double-barrier magnetic tunnel junctions dc.type Article dc.contributor.department Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division dc.contributor.department Electrical Engineering Program dc.contributor.department Physical Science and Engineering (PSE) Division dc.contributor.department Sensing, Magnetism and Microsystems Lab dc.identifier.journal IEEE Transactions on Magnetics kaust.person Useinov, Arthur kaust.person Kosel, Jürgen
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