Physics – Condensed Matter – Materials Science
Scientific paper
2007-09-05
Physics
Condensed Matter
Materials Science
20 pages, 6 figures, submitted to Phys. Rev. B
Scientific paper
10.1103/PhysRevB.77.054440
We describe time-domain measurements which provide new information about the large-angle nonlinear dynamics of nanomagnets excited by spin-transfer torque from a spin-polarized current. Sampling-oscilloscope measurements, which average over thousands of experimental time traces, show that the mean reversal time for spin-transfer-driven magnetic switching has a step-like dependence on magnetic field, because an integer number of precession cycles is required for reversal. Storage-oscilloscope measurements of individual experimental traces reveal non-periodic large-amplitude resistance variations at values of magnetic field and current in a crossover region between the regimes of spin-transfer-driven switching and steady-state precession. We also observe directly the existence of time-dependent switching, on the nanosecond scale, between different precessional modes and between a precessional mode and a static state, at particular values of magnetic field and current bias.
Buhrman Robert A.
Emley N. C.
Krivorotov Ilya N.
Ralph Daniel C.
No associations
LandOfFree
Time-Domain Studies of Very-Large-Angle Magnetization Dynamics Excited by Spin Transfer Torques does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Time-Domain Studies of Very-Large-Angle Magnetization Dynamics Excited by Spin Transfer Torques, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time-Domain Studies of Very-Large-Angle Magnetization Dynamics Excited by Spin Transfer Torques will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-469938