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.

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• Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
• Current induced distortion of a magnetic domain wall
• Magnetic memory and current amplification devices using moving domain walls
• A simple vision of current induced spin torque in domain walls
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Cited by in corpus (8)

• Theoretical Study of Spin-Torque Oscillator with Perpendicularly Magnetized Free Layer
• Dissipation due to pure spin-current generated by spin pumping
• Electron scattering from domain walls in ferromagnetic Luttinger liquids
• Boltzmann theory of magnetoresistance due to a spin spiral
• Nonlocal spin torques in Rashba quantum wires with steep magnetic textures
• Indirect excitation of self-oscillation in perpendicular ferromagnet by spin Hall effect
• First-principles calculations of current-induced spin-transfer torques in magnetic domain walls
• Local spin transfer torque and magnetoresistance in domain walls with variable width