5 papers · 1 filter
Spin-Transfer Excitations of Permalloy Nanopillars for Large Applied Currents
S. I. Kiselev, J. C. Sankey, I. N. Krivorotov +4
Using measurements of the spectra of microwave-frequency resistance oscillations, we determine the phase diagram of magnetic excitations caused by torques from DC spin-polarized cu…
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…
Temperature dependence of spin-transfer-induced switching of nanomagnets
I. N. Krivorotov, N. C. Emley, A. G. F. Garcia +4
We measure the temperature, magnetic-field, and current dependence for the switching of nanomagnets by a spin-polarized current. Depending on current bias, switching can occur betw…
Current-Induced Nanomagnet Dynamics for Magnetic Fields Perpendicular to the Sample Plane
S. I. Kiselev, J. C. Sankey, I. N. Krivorotov +5
We present electrical measurements of high-frequency magnetic dynamics excited by spin-polarized currents in Co/Cu/Ni80Fe20 nanopillar devices, with a magnetic field applied perpen…
Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
S. I. Kiselev, J. C. Sankey, I. N. Krivorotov +4
We describe direct electrical measurements of microwave-frequency dynamics in individual nanomagnets that are driven by spin transfer from a DC spin-polarized current. We map out t…