Open AccessEffects of spin-polarized current on pulse field-induced precessional magnetization reversal
Author(s) -
Guangfu Zhang,
Guanghua Guo,
Xi-guang Wang,
Yao-zhuang Nie,
Zhi-xiong Li
Publication year - 2012
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4765668
Subject(s) - magnetization , condensed matter physics , ringing , pulse (music) , current density , magnetic field , current (fluid) , spin (aerodynamics) , magnetization reversal , field (mathematics) , physics , nuclear magnetic resonance , materials science , optics , magnetic anisotropy , mathematics , filter (signal processing) , quantum mechanics , detector , computer science , pure mathematics , computer vision , thermodynamics
We investigate effects of a small DC spin-polarized current on the pulse field-induced precessional magnetization reversal in a thin elliptic magnetic element by micromagnetic simulations. We find that the spin-polarized current not only broadens the time window of the pulse duration, in which a successful precessional reversal is achievable, but also significantly suppresses the magnetization ringing after the reversal. The pulse time window as well as the decay rate of the ringing increase with increasing the current density. When a spin-polarized current with 5 MA/cm2 is applied, the time window increases from 80 ps to 112 ps, and the relaxation time of the ringing decreases from 1.1 ns to 0.32 ns. Our results provide useful information to achieve magnetic nanodevices based on precessional switching
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