Thermally-Assisted Current-Driven Domain Wall Motion

Abstract

Starting from the stochastic Landau-Lifschitz-Gilbert equation, we derive Langevin equations that describe the nonzero-temperature dynamics of a rigid domain wall. We derive an expression for the average drift velocity of the domain wall as a function of the applied current, and find qualitative agreement with recent magnetic semiconductor experiments. Our model implies that at any nonzero temperature the average domain-wall velocity initially varies linearly with current, even in the absence of non-adiabatic spin torques.

4 pages, 2 figures

References in corpus (1)

• Microscopic Calculation of Spin Torques in Disordered Ferromagnets

Cited by in corpus (11)

• Microscopic approach to current-driven domain wall dynamics
• Theory of current-driven magnetization dynamics in inhomogeneous ferromagnets
• Spin pumping by a field-driven domain wall
• Functional Keldysh Theory of Spin Torques
• Spin Pumping of Current in Non-Uniform Conducting Magnets
• Current-Induced Torques in Magnetic Metals: Beyond Spin Transfer
• Effects of non-adiabaticity on the voltage generated by a moving domain wall
• Current-induced noise and damping in non-uniform ferromagnets
• Creep of current-driven domain-wall lines: intrinsic versus extrinsic pinning
• Domain walls in (Ga,Mn)As diluted magnetic semiconductor
• Current-Induced Motion of Narrow Domain Walls and Dissipation in Ferromagnetic Metals