Abstract
Magnetization reversal of uniaxial Stoner particles under the Slonczewski spin-transfer torques of polarized electric currents is investigated. Based on the modified Landau-Lifshitz-Gilbert equation of magnetization dynamics, the theoretical limit of critical currents required to reverse a magnetization with an arbitrary polarized current is obtained. Under a constant polarization degree and constant current amplitude, the optimal current pulse for the fastest magnetization reversal is derived. These results can be used as benchmarks to evaluate different reversal strategies besides other possible usages.
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