Magnetic domain wall motion by spin transfer

Domain wall motion in nanopillar spin-valves with perpendicular anisotropy driven by spin-transfer torques

J. Cucchiara,1 S. Le Gall,1 E. E. Fullerton,2 J.-V. Kim,3 D. Ravelosona,3 Y. Henry,4 J. A. Katine,5 A. D. Kent,6 D. Bedau,6 D. Gopman,6 and S. Mangin1 1Institut Jean Lamour, Université de Lorraine UMR CNRS 7198, Vandoeuvre lès Nancy, France 2Center for Magnetic Recording Research, University of California San Diego, La Jolla, California 92093-0401, USA 3Institut d’Electronique Fondamentale, UMR...

Domain wall motion by the magnonic spin Seebeck effect.

The recently discovered spin Seebeck effect refers to a spin current induced by a temperature gradient in a ferromagnetic material. It combines spin degrees of freedom with caloric properties, opening the door for the invention of new, spin caloritronic devices. Using spin model simulations as well as an innovative, multiscale micromagnetic framework we show that magnonic spin currents caused b...

Antiferromagnetic Domain Wall Motion Driven by Spin-Orbit Torques.

We theoretically investigate the dynamics of antiferromagnetic domain walls driven by spin-orbit torques in antiferromagnet-heavy-metal bilayers. We show that spin-orbit torques drive antiferromagnetic domain walls much faster than ferromagnetic domain walls. As the domain wall velocity approaches the maximum spin-wave group velocity, the domain wall undergoes Lorentz contraction and emits spin...

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...

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