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A Two-Band Tight-Binding Model of Spin-Polarized Transport in Magnetic Tunnel Junctions

Published: 10 January 2013
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Abstract

The main features determining spin-dependent transport in magnetic tunnel junctions are well appreciated now mainly due to ab initio calculations. Nevertheless, it seems useful to have a comparatively simple model which reproduces the salient characteristics of spin-dependent transport in magnetic multilayers. We present two-band tight-binding model of magnetic tunnel junction with the layers of arbitrary thickness and non-collinear magnetization configuration. The model accounts for different symmetry of the tunneling electrons and their mixing on the interfaces. As an illustration for double-barrier structure we calculate I-V curves and spin-transfer torque. The calculations demonstrate the resonant character of the I-V dependences. Also, the significant difference in the magnitude of the torque acting on the various planes of the same magnetic layer is found.

Published in International Journal of Materials Science and Applications (Volume 2, Issue 1)
DOI 10.11648/j.ijmsa.20130201.13
Page(s) 20-29
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2013. Published by Science Publishing Group

Keywords

Magnetic Tunnel Junction, Two-Band Model, I-V Curves, Spin-Transfer Torque

References
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Cite This Article
  • APA Style

    N. Strelokov, M. Zhuravlev, N. Ryzhanova, A. Vedyayev. (2013). A Two-Band Tight-Binding Model of Spin-Polarized Transport in Magnetic Tunnel Junctions. International Journal of Materials Science and Applications, 2(1), 20-29. https://doi.org/10.11648/j.ijmsa.20130201.13

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    ACS Style

    N. Strelokov; M. Zhuravlev; N. Ryzhanova; A. Vedyayev. A Two-Band Tight-Binding Model of Spin-Polarized Transport in Magnetic Tunnel Junctions. Int. J. Mater. Sci. Appl. 2013, 2(1), 20-29. doi: 10.11648/j.ijmsa.20130201.13

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    AMA Style

    N. Strelokov, M. Zhuravlev, N. Ryzhanova, A. Vedyayev. A Two-Band Tight-Binding Model of Spin-Polarized Transport in Magnetic Tunnel Junctions. Int J Mater Sci Appl. 2013;2(1):20-29. doi: 10.11648/j.ijmsa.20130201.13

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  • @article{10.11648/j.ijmsa.20130201.13,
      author = {N. Strelokov and M. Zhuravlev and N. Ryzhanova and A. Vedyayev},
      title = {A Two-Band Tight-Binding Model of Spin-Polarized Transport in Magnetic Tunnel Junctions},
      journal = {International Journal of Materials Science and Applications},
      volume = {2},
      number = {1},
      pages = {20-29},
      doi = {10.11648/j.ijmsa.20130201.13},
      url = {https://doi.org/10.11648/j.ijmsa.20130201.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmsa.20130201.13},
      abstract = {The main features determining spin-dependent transport in magnetic tunnel junctions  are well appreciated now mainly due to ab initio calculations. Nevertheless, it seems useful to have a comparatively simple model which reproduces the salient characteristics of spin-dependent transport in magnetic multilayers. We present two-band tight-binding model of magnetic tunnel junction with the layers of arbitrary thickness and non-collinear magnetization configuration. The model accounts for different symmetry of the tunneling electrons and their mixing on the interfaces. As an illustration for double-barrier structure we calculate I-V curves and spin-transfer torque. The calculations demonstrate the resonant character of the I-V dependences. Also, the significant difference in the magnitude of the torque acting on the various planes of the same magnetic layer is found.},
     year = {2013}
    }
    

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    T1  - A Two-Band Tight-Binding Model of Spin-Polarized Transport in Magnetic Tunnel Junctions
    AU  - N. Strelokov
    AU  - M. Zhuravlev
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    N1  - https://doi.org/10.11648/j.ijmsa.20130201.13
    DO  - 10.11648/j.ijmsa.20130201.13
    T2  - International Journal of Materials Science and Applications
    JF  - International Journal of Materials Science and Applications
    JO  - International Journal of Materials Science and Applications
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    UR  - https://doi.org/10.11648/j.ijmsa.20130201.13
    AB  - The main features determining spin-dependent transport in magnetic tunnel junctions  are well appreciated now mainly due to ab initio calculations. Nevertheless, it seems useful to have a comparatively simple model which reproduces the salient characteristics of spin-dependent transport in magnetic multilayers. We present two-band tight-binding model of magnetic tunnel junction with the layers of arbitrary thickness and non-collinear magnetization configuration. The model accounts for different symmetry of the tunneling electrons and their mixing on the interfaces. As an illustration for double-barrier structure we calculate I-V curves and spin-transfer torque. The calculations demonstrate the resonant character of the I-V dependences. Also, the significant difference in the magnitude of the torque acting on the various planes of the same magnetic layer is found.
    VL  - 2
    IS  - 1
    ER  - 

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Author Information
  • Department of Physics, Lomonosov Moscow State University, Moscow, Russia

  • Kurnakov Institute of General and Inorganic Chemistry of RAS, Moscow

  • Department of Physics, Lomonosov Moscow State University, Moscow, Russia

  • Department of Physics, Lomonosov Moscow State University, Moscow, Russia

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