Micromagnetic simulations of current-induced magnetization switching in CoCuCo nanopillars

Z. H. Xiao, X. Q. Ma, P. P. Wu, J. X. Zhang, Long-qing Chen, S. Q. Shi

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We studied the current-induced magnetic switching in CoCuCo nanopillars with an in-plane magnetization traversed by a perpendicular-to-plane spin-polarized current. The Landau-Lifshitz-Gilbert equation incorporating the spin transfer torque (STT) effect was employed. Magnetization switching was found to take place when the current density exceeds a threshold. It is accompanied by drastic oscillations near the magnetic reversal point. The switching time depends on the applied current density. The magnetization can also be switched by a sufficiently long square pulsed current. The roles of anisotropy, exchange, and demagnetization energies in the magnetization switching process of nanopillars are discussed. It is shown that the switching is mainly determined by the competition between STT and the Gilbert damping torque.

Original languageEnglish (US)
Article number093907
JournalJournal of Applied Physics
Volume102
Issue number9
DOIs
StatePublished - Nov 23 2007

Fingerprint

torque
magnetization
simulation
current density
magnetic switching
demagnetization
damping
oscillations
anisotropy
thresholds
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

Cite this

Xiao, Z. H. ; Ma, X. Q. ; Wu, P. P. ; Zhang, J. X. ; Chen, Long-qing ; Shi, S. Q. / Micromagnetic simulations of current-induced magnetization switching in CoCuCo nanopillars. In: Journal of Applied Physics. 2007 ; Vol. 102, No. 9.
@article{5bf05b304d9b40df900ecd53e076a4c7,
title = "Micromagnetic simulations of current-induced magnetization switching in CoCuCo nanopillars",
abstract = "We studied the current-induced magnetic switching in CoCuCo nanopillars with an in-plane magnetization traversed by a perpendicular-to-plane spin-polarized current. The Landau-Lifshitz-Gilbert equation incorporating the spin transfer torque (STT) effect was employed. Magnetization switching was found to take place when the current density exceeds a threshold. It is accompanied by drastic oscillations near the magnetic reversal point. The switching time depends on the applied current density. The magnetization can also be switched by a sufficiently long square pulsed current. The roles of anisotropy, exchange, and demagnetization energies in the magnetization switching process of nanopillars are discussed. It is shown that the switching is mainly determined by the competition between STT and the Gilbert damping torque.",
author = "Xiao, {Z. H.} and Ma, {X. Q.} and Wu, {P. P.} and Zhang, {J. X.} and Long-qing Chen and Shi, {S. Q.}",
year = "2007",
month = "11",
day = "23",
doi = "10.1063/1.2800999",
language = "English (US)",
volume = "102",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "9",

}

Micromagnetic simulations of current-induced magnetization switching in CoCuCo nanopillars. / Xiao, Z. H.; Ma, X. Q.; Wu, P. P.; Zhang, J. X.; Chen, Long-qing; Shi, S. Q.

In: Journal of Applied Physics, Vol. 102, No. 9, 093907, 23.11.2007.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Micromagnetic simulations of current-induced magnetization switching in CoCuCo nanopillars

AU - Xiao, Z. H.

AU - Ma, X. Q.

AU - Wu, P. P.

AU - Zhang, J. X.

AU - Chen, Long-qing

AU - Shi, S. Q.

PY - 2007/11/23

Y1 - 2007/11/23

N2 - We studied the current-induced magnetic switching in CoCuCo nanopillars with an in-plane magnetization traversed by a perpendicular-to-plane spin-polarized current. The Landau-Lifshitz-Gilbert equation incorporating the spin transfer torque (STT) effect was employed. Magnetization switching was found to take place when the current density exceeds a threshold. It is accompanied by drastic oscillations near the magnetic reversal point. The switching time depends on the applied current density. The magnetization can also be switched by a sufficiently long square pulsed current. The roles of anisotropy, exchange, and demagnetization energies in the magnetization switching process of nanopillars are discussed. It is shown that the switching is mainly determined by the competition between STT and the Gilbert damping torque.

AB - We studied the current-induced magnetic switching in CoCuCo nanopillars with an in-plane magnetization traversed by a perpendicular-to-plane spin-polarized current. The Landau-Lifshitz-Gilbert equation incorporating the spin transfer torque (STT) effect was employed. Magnetization switching was found to take place when the current density exceeds a threshold. It is accompanied by drastic oscillations near the magnetic reversal point. The switching time depends on the applied current density. The magnetization can also be switched by a sufficiently long square pulsed current. The roles of anisotropy, exchange, and demagnetization energies in the magnetization switching process of nanopillars are discussed. It is shown that the switching is mainly determined by the competition between STT and the Gilbert damping torque.

UR - http://www.scopus.com/inward/record.url?scp=36248988988&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=36248988988&partnerID=8YFLogxK

U2 - 10.1063/1.2800999

DO - 10.1063/1.2800999

M3 - Article

VL - 102

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 9

M1 - 093907

ER -