Dynamics of a domain wall and spin-wave excitations driven by a mesoscopic current

Abstract

The dynamics of a domain wall driven by a spin-polarized current in a mesoscopic system is studied numerically. Spin-mixing in the states of the conduction electrons is fully taken into account. When the Fermi energy of the electrons is larger than the exchange energy ($E_{\mathrm{F}}>J_{\mathrm{sd}}$), the spin precession induces spin wave excitations in the local spins which contribute towards the displacement of the domain wall. The resulting average velocity is found to be much smaller than the one obtained in the adiabatic limit. For $E_{\mathrm{F}}<J_{\mathrm{sd}}$, the results are consistent with the adiabatic approximation except for the region below the critical current where a residual domain wall velocity is found.

arXiv comment5 pages, 3 figures

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• Current-excited magnetization dynamics in narrow ferromagnetic wires
• Spin and charge pumping by steady or pulse current-driven magnetic domain wall: A self-consistent multiscale time-dependent-quantum/time-dependent-classical approach
• Giant current-driven domain wall mobility in (Ga,Mn)As
• Effects of non-adiabaticity on the voltage generated by a moving domain wall
• Theory of Domain Wall Dynamics under Current
• Self-consistent calculation of spin transport and magnetization dynamics
• Current-induced motion of a domain wall in magnetic nanowires
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• Simulation of current-induced microwave oscillation in geometrically confined domain wall
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• Numerical Computation of Spin-Transfer Torques for Antiferromagnetic Domain walls
• Screw-pitch effect and velocity oscillation of domain-wall in ferromagnetic nanowire driven by spin-polarized current
• Nonlocal spin torques in Rashba quantum wires with steep magnetic textures
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• First-principles calculations of current-induced spin-transfer torques in magnetic domain walls
• Spatio-temporal dynamics of voltage-induced resistance transition in the double-exchange model
• Numerical Study of Current-Induced Domain-Wall Dynamics: Crossover from Spin Transfer to Momentum Transfer
• Spin-reorientation critical dynamics in the two-dimensional XY model with a domain wall