384 citations · 502 across the 3 of their papers we have counts for
6 papers
Enhancement in spin-torque efficiency by nonuniform spin current generated within a tapered nanopillar spin valve
P. M. Braganca, O. Ozatay, A. G. F. Garcia +3
We examine the effect a spatially non-uniform spin current with a component polarized partially out of the plane has on a low saturation magnetization nanomagnet free layer. Microm…
Spin-Torque Ferromagnetic Resonance Measurements of Damping in Nanomagnets
G. D. Fuchs, J. C. Sankey, V. S. Pribiag +8
We measure the magnetic damping parameter a in thin film CoFeB and permalloy (Py) nanomagnets at room temperature using ferromagnetic resonance driven by microwave frequency spin-t…
Spin-transfer-driven ferromagnetic resonance of individual nanomagnets
J. C. Sankey, P. M. Braganca, A. G. F. Garcia +3
We demonstrate a technique that enables ferromagnetic resonance (FMR) measurements of the normal modes for magnetic excitations in individual nanoscale ferromagnets, smaller in vol…
Mechanisms limiting the coherence time of spontaneous magnetic oscillations driven by DC spin-polarized currents
J. C. Sankey, I. N. Krivorotov, S. I. Kiselev +4
The spin-transfer torque from a DC spin-polarized current can generate highly-coherent magnetic precession in nanoscale magnetic-multilayer devices. By measuring linewidths of spec…
Adjustable spin torque in magnetic tunnel junctions with two fixed layers
G. D. Fuchs, I. N. Krivorotov, P. M. Braganca +4
We have fabricated nanoscale magnetic tunnel junctions (MTJs) with an additional fixed magnetic layer added above the magnetic free layer of a standard MTJ structure. This acts as…
Spin-Transfer Effects in Nanoscale Magnetic Tunnel Junctions
G. D. Fuchs, N. C. Emley, I. N. Krivorotov +7
We report measurements of magnetic switching and steady-state magnetic precession driven by spin-polarized currents in nanoscale magnetic tunnel junctions with low-resistance, < 5…