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Technical Physics

, Volume 51, Issue 11, pp 1398–1404 | Cite as

Effect of interfacial s-d scattering on transport in structures ferromagnet/insulator/ferromagnet

  • S. A. Ignatenko
Theoretical and Mathematical Physics

Abstract

A two-band s-d model based on the Green function method has been developed for calculating the conductivity and tunnel magnetoresistance of ferromagnet/insulator/ferromagnet structures. It is shown that s-d scattering at the interface between the ferromagnet and the insulator in Fe/Al2O3/Fe increases the tunnel magnetoresistance. The spin polarization of the current decreases thereby and even becomes negative, which is mainly due to scattering of strongly localized d electrons to the s band, followed by tunnelling through the insulator.

PACS numbers

71.10.Fd 72.10.-d 72.10.Fk 72.25.Ba 72.25.Mk 73.40.Rw 

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Copyright information

© Pleiades Publishing, Inc. 2006

Authors and Affiliations

  • S. A. Ignatenko
    • 1
  1. 1.Belarussian State University of Information Science and Radio EngineeringMinskBelarus

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