Theory of spin accumulation and spin transfer torque in a magnetic domain wall
Mesoscale and Nanoscale Physics
2009-06-25 v2
Abstract
We study spin accumulation and spin transfer torque in a domain wall by solving the Boltzmann equation with a diffusion approximation. We obtained the analytical expressions of spin accumulation and spin transfer torque. Both the adiabatic and the non-adiabatic components of the spin transfer torque oscillate with the thickness of the domain wall. We show that the oscillation plays a dominant role in the non-adiabatic torque when the domain wall thickness is less than the spin-flip length, which is defined by the product of the Fermi velocity and the spin-flip scattering time.
Keywords
Cite
@article{arxiv.0902.4094,
title = {Theory of spin accumulation and spin transfer torque in a magnetic domain wall},
author = {Tomohiro Taniguchi and Jun Sato and Hiroshi Imamura},
journal= {arXiv preprint arXiv:0902.4094},
year = {2009}
}