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arXiv · 0902.4094

Theory of spin accumulation and spin transfer torque in a magnetic domain wall

Tomohiro Taniguchi·Jun Sato·Hiroshi Imamura
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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.

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Tomohiro Taniguchi, Jun Sato, Hiroshi Imamura. 2009-06-24. Theory of spin accumulation and spin transfer torque in a magnetic domain wall. https://doi.org/10.1103/physrevb.79.212410

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