@article{25edefe5720d4132bf730c3d4bdabdf4,
title = "Current-induced magnetization dynamics in CoCuCo nanopillars",
abstract = "We studied current-induced magnetization dynamics in CoCuCo nanopillars using the Landau-Lifshitz-Gilbert equation incorporating the spin transfer torque effect. We show that the magnetization dynamics can be grouped into four types according to its characteristics and the current density value under zero external field. It is found that an external field can significantly affect the magnetization dynamics, either favoring or impeding the magnetization switching depending on its direction.",
author = "Ma, {X. Q.} and Xiao, {Z. H.} and Wu, {P. P.} and Zhang, {J. X.} and Shi, {S. Q.} and Chen, {L. Q.}",
note = "Funding Information: This work was supported by the Joint Research Fund for Overseas Distinguished Chinese Young Scholars from the National Science Foundation of China (Grant No. 50428101) and by SRF for ROCS, SEM. FIG. 1. Model geometry definition of Co ∕ Cu ∕ Co nanopillar. FIG. 2. Schematic map of current density range of different magnetization dynamic types. The four different colors correspond to four types of magnetization dynamics. The width of each section represents the current density range of corresponding dynamic type. The missing type of magnetization dynamics for PS to APS is precessional state. FIG. 3. The domain structure of free layer in different states. (a) The magnetization lies along the − x axis. (b) A multidomain structure of MS under current density of 5.0 × 10 7 A ∕ cm 2 . (c) The magnetization lies along the + x axis. FIG. 4. The temporal evolution of the x component of magnetization M x under four different current densities. FIG. 5. The magnetization dynamics in current density of 9.0 × 10 7 A ∕ cm 2 under different external fields. FIG. 6. The relationship of the switching threshold current density vs external field. ",
year = "2008",
doi = "10.1063/1.2838317",
language = "English (US)",
volume = "103",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics",
number = "7",
}