Generalized analysis of thermally activated domain-wall motion in Co/Pt multilayers
arXiv:1410.7685 · doi:10.1016/j.jmmm.2014.10.147
Abstract
Thermally activated domain-wall (DW) motion driven by magnetic field and electric current is investigated experimentally in out-of-plane magnetized Pt(Co/Pt) multilayers. We directly extract the thermal activation energy barrier for DW motion and observe the dynamic regimes of creep, depinning, and viscous flow. Further analysis reveals that the activation energy must be corrected with a factor dependent on the Curie temperature, and we derive a generalized Arrhenius-like equation governing thermally activated motion. By using this generalized equation, we quantify the efficiency of current-induced spin torque in assisting DW motion. Current produces no effect aside from Joule heating in the multilayer with 7-Å thick Co layers, whereas it generates a finite spin torque on DWs in the multilayer with atomically thin 3-Å Co layers. These findings suggest that conventional spin-transfer torques from in-plane spin-polarized current do not drive DWs in ultrathin Co/Pt multilayers.
References in corpus (24)
- Spin torque switching with the giant spin Hall effect of tantalum
- Magnetic switching by spin torque from the spin Hall effect
- Spin Transfer Torques
- Current-driven dynamics of chiral ferromagnetic domain walls
- Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
- Dynamics of Dzyaloshinskii domain walls in ultrathin magnetic films
- Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
- Creep and flow regimes of magnetic domain wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
- Domain wall motion governed by the spin Hall effect
- Matching domain wall configuration and spin-orbit torques for very efficient domain-wall motion
- Asymmetric Magnetic Domain-Wall Motion by the Dzyaloshinskii-Moriya Interaction
- Domain wall propagation in magnetic nanowires by spin polarized current injection
- Spin Hall torque magnetometry of Dzyaloshinskii domain walls
- Diffusive spin dynamics in ferromagnetic thin films with a Rashba interaction
- Magnetization dynamics induced by in-plane currents in ultrathin magnetic nanostructures
- High domain wall velocities induced by current in ultrathin Pt/Co/AlOx wires with perpendicular magnetic anisotropy
- Threshold Current of Domain Wall Motion under Extrinsic Pinning, -Term and Non-Adiabaticity
- The domain wall spin torque-meter
- Electric Control of Multiple Domain Walls in Pt/Co/Pt Nanotrack with Perpendicular Magnetic Anisotropy
- Creep of current-driven domain-wall lines: intrinsic versus extrinsic pinning
- Interfacial current-induced torques in Pt/Co/GdOx
- Magnetic domain wall motion in a nanowire: depinning and creep
- Domain wall structure in magnetic bilayers with perpendicular anisotropy
- Influence of magnetic viscosity on domain wall dynamics under spin-polarized currents
Cited by in corpus (6)
- Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
- Universal pinning energy barrier for driven domain walls in thin ferromagnetic films
- Visualizing the strongly reshaped skyrmion Hall effect in multilayer wire devices
- Influence of Joule heating on current-induced domain wall depinning
- Oersted field and spin current effects on magnetic domains in [Co/Pd]15 nanowires
- Domain wall dynamics in stepped magnetic nanowire with perpendicular magnetic anisotropy