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Time-Resolved Spin Torque Switching and Enhanced Damping in Py/Cu/Py Spin-Valve Nanopillars
N. C. Emley, I. N. Krivorotov, A. G. F. Garcia +4
We report time-resolved measurements of current-induced reversal of a free magnetic layer in Py/Cu/Py elliptical nanopillars at temperatures T = 4.2 K to 160 K. Comparison of the d…
From ballistic transport to tunneling in electromigrated ferromagnetic breakjunctions
Kirill I. Bolotin, F. Kuemmeth, Abhay N. Pasupathy +1
We fabricate ferromagnetic nanowires with constrictions whose cross section can be reduced gradually from 100 nm to the atomic scale and eventually to the tunneling regime by means…
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…