1302.4770 (Tom Dunn et al.)

Optimization of spin-torque switching using AC and DC pulses    [PDF]

Tom Dunn, Alex Kamenev

We explore spin-torque induced magnetic reversal in magnetic tunnel junctions using combined AC and DC spin-current pulses. We calculate the optimal pulse times for both the AC and DC pulses, needed to minimize the Joule heat lost during the switching process for a given AC driving frequency and spin-current magnitude. The results of this optimization are compared against numeric simulations. Finally we show how this optimization leads to different dynamic regimes, where switching is optimized by either a purely AC or DC spin-current, or a combination AC/DC spin-current, depending on the anisotropy energies and the spin-current polarization.

View original: http://arxiv.org/abs/1302.4770