Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars

Abstract

Using thin film pillars ~100 nm in diameter, containing two ferromagnetic Co layers of different thicknesses separated by a paramagnetic Cu spacer, we examine effects of torques due to spin-polarized currents flowing perpendicular to the layers. In accordance with spin-transfer theory, spin-polarized electrons flowing from the thin to the thick Co layer can switch the magnetic moments of the layers antiparallel, while a reversed electron flow causes switching to a parallel state. When large magnetic fields are applied, the current no longer fully reverses the magnetic moment, but instead stimulates spin-wave excitations.

4 pages, 3 figures

References in corpus (1)

• Modification of the Landau-Lifshitz Equation in the Presence of a Spin-Polarized Current in CMR and GMR Materials

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• New mechanism for generating spin transfer torque without charge current
• Theoretical study of a localized quantum spin reversal by the sequential injection of spins in a spin quantum dot
• Spin Transfer Torque in the Semiconductor/Ferromagnetic Structure in the Presence of Rashba Effect
• Probing domain wall dynamics in magnetic Weyl semimetals via the non-linear anomalous Hall effect
• Impact of current paths on measurement of tunneling magnetoresistance and spin torque critical current densities in GaMnAs-based magnetic tunnel junctions
• Parametric instability of a magnetic junction under modulated spin-polarized current
• Anomalous stabilization in a spin-transfer system at high spin polarization
• Simulation of highly idealized, atomic scale MQCA logic circuits
• Spin flip scattering engendered quantum spin torque in a Josephson junction
• Strain-mediated magnetoelectric effect for the electric-field control of magnetic states in nanomagnets
• Control of ultrashort spin current pulses in metallic multilayers
• From Spin Torque Nano-Oscillators to Memristors: Multi-Functional Nanodevices for Advanced Computing
• Alternating current driven instability in magnetic junctions
• Changes in the coercivity fields of magnetoresistance hysteresis loops under the influence of a spin-polarized current
• Exchange-dominated Standing Spin Wave Excitations under microwave irradiation in Ni80Fe20 Thin Films
• Yield, Area and Energy Optimization in Stt-MRAMs using failure aware ECC
• A new route to spin-orbit torque engineering via oxygen manipulation
• Theory of Tunneling between Two-Dimensional Electron Layers Driven by Spin Pumping: Adiabatic Regime and Beyond
• Current-induced spin-orbit torque on the surface of a transition metal dichalcogenide connected to a two-dimensional ferromagnet CrI${}_3$: Effects of twisting and gating
• Scheme for braiding Majorana zero modes in vortices using an STT-matrix
• Current-induced magnetization reversal in pseudo spin valves in current-in-plane configuration