Current-driven domain wall motion with spin Hall effect: Reduction of threshold current density

Current-Driven Domain Wall Motion: Velocity, Current and Phase Transition

The relation between domain wall motion and intensity of driven current is examined in a phenomenological theory where the kinetic energy is expanded as a series of polynomial function of current density just as the Landau phase transition theory. The dependency of velocity on current density is square root which degenerates into linear if the current is much higher than the critical value. The...

Comment on "Theory of current-driven domain wall motion: spin transfer versus momentum transfer".

Theory of current-driven domain wall motion: spin transfer versus momentum transfer.

A self-contained theory of the domain wall dynamics in ferromagnets under finite electric current is presented. The current has two effects: one is momentum transfer, which is proportional to the charge current and wall resistivity (rho(w)); the other is spin transfer, proportional to spin current. For thick walls, as in metallic wires, the latter dominates and the threshold current for wall mo...

Curvature and torsion effects in spin-current driven domain wall motion

Kostiantyn V. Yershov,1,2,* Volodymyr P. Kravchuk,1,† Denis D. Sheka,3,‡ and Yuri Gaididei1,§ 1Bogolyubov Institute for Theoretical Physics of National Academy of Sciences of Ukraine, 03680 Kyiv, Ukraine 2National University of “Kyiv-Mohyla Academy”, 04655 Kyiv, Ukraine 3Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine (Received 18 December 2015; revised manuscript received 7 F...

Temperature dependence of the spin torque effect in current-induced domain wall motion.

We present an experimental study of domain wall motion induced by current pulses as well as by conventional magnetic fields at temperatures between 2 and 300 K in a 110 nm wide and 34 nm thick Ni80Fe20 ring. We observe that, in contrast with field-induced domain wall motion, which is a thermally activated process, the critical current density for current-induced domain wall motion increases wit...