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

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.

References in corpus (3)

• Magnetic memory and current amplification devices using moving domain walls
• Effective Resistance Mismatch and Magnetoresistance of a CPP-GMR system with Current-Confined-Paths
• Magnetic structure of domain walls confined in a nano-oxide layer

Cited by in corpus (4)

• Dissipation due to pure spin-current generated by spin pumping
• Electron scattering from domain walls in ferromagnetic Luttinger liquids
• Indirect excitation of self-oscillation in perpendicular ferromagnet by spin Hall effect
• Local spin transfer torque and magnetoresistance in domain walls with variable width