The European Physical Journal B

, Volume 59, Issue 4, pp 415–427

A numerical method to solve the Boltzmann equation for a spin valve

Authors

  • J. Xiao
    • School of Physics, Georgia Institute of Technology
  • A. Zangwill
    • School of Physics, Georgia Institute of Technology
    • Electron Physics Group, National Institute of Standards and Technology
Topical Issue on New Trends in Spin Transfer Physics

DOI: 10.1140/epjb/e2007-00004-0

Cite this article as:
Xiao, J., Zangwill, A. & Stiles, M. Eur. Phys. J. B (2007) 59: 415. doi:10.1140/epjb/e2007-00004-0

Abstract.

We present a numerical algorithm to solve the Boltzmann equation for the electron distribution function in magnetic multilayer heterostructures with non-collinear magnetizations. The solution is based on a scattering matrix formalism for layers that are translationally invariant in plane so that properties only vary perpendicular to the planes. Physical quantities like spin density, spin current, and spin-transfer torque are calculated directly from the distribution function. We illustrate our solution method with a systematic study of the spin-transfer torque in a spin valve as a function of its geometry. The results agree with a hybrid circuit theory developed by Slonczewski for geometries typical of those measured experimentally.

PACS.

85.75.-d Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields 75.47.De Giant magnetoresistance

Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007