Ultrafast switching of a nanomagnet by a combined out-of-plane and in-plane polarized spin current pulse

O. J. Lee; V. S. Pribiag; P. M. Braganca; P. G. Gowtham; D. C. Ralph; R. A. Buhrman

doi:10.1063/1.3176938

Ultrafast switching of a nanomagnet by a combined out-of-plane and in-plane polarized spin current pulse

O. J. Lee, V. S. Pribiag, P. M. Braganca, P. G. Gowtham, D. C. Ralph, R. A. Buhrman

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

We report on spin valve devices that incorporate both an out-of-plane polarizer (OPP) to quickly excite spin torque (ST) switching and an in-plane polarizer/analyzer (IPP). For pulses <200 ps, we observe reliable precessional switching due largely to ST from the OPP. Compared to a conventional spin valve, for a given current amplitude from ∼2 to 3 times the zero-thermal-fluctuation critical current (I_c0), the addition of the OPP can decrease the pulse width necessary for switching by a factor of 10 or more. The effect of the IPP also has beneficial ST consequences for the short pulse switching behavior.

Original language	English (US)
Article number	012506
Journal	Applied Physics Letters
Volume	95
Issue number	1
DOIs	https://doi.org/10.1063/1.3176938
State	Published - Jul 20 2009

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title = "Ultrafast switching of a nanomagnet by a combined out-of-plane and in-plane polarized spin current pulse",

abstract = "We report on spin valve devices that incorporate both an out-of-plane polarizer (OPP) to quickly excite spin torque (ST) switching and an in-plane polarizer/analyzer (IPP). For pulses <200 ps, we observe reliable precessional switching due largely to ST from the OPP. Compared to a conventional spin valve, for a given current amplitude from ∼2 to 3 times the zero-thermal-fluctuation critical current (Ic0), the addition of the OPP can decrease the pulse width necessary for switching by a factor of 10 or more. The effect of the IPP also has beneficial ST consequences for the short pulse switching behavior.",

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T1 - Ultrafast switching of a nanomagnet by a combined out-of-plane and in-plane polarized spin current pulse

AU - Lee, O. J.

AU - Pribiag, V. S.

AU - Braganca, P. M.

AU - Gowtham, P. G.

AU - Ralph, D. C.

AU - Buhrman, R. A.

PY - 2009/7/20

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N2 - We report on spin valve devices that incorporate both an out-of-plane polarizer (OPP) to quickly excite spin torque (ST) switching and an in-plane polarizer/analyzer (IPP). For pulses <200 ps, we observe reliable precessional switching due largely to ST from the OPP. Compared to a conventional spin valve, for a given current amplitude from ∼2 to 3 times the zero-thermal-fluctuation critical current (Ic0), the addition of the OPP can decrease the pulse width necessary for switching by a factor of 10 or more. The effect of the IPP also has beneficial ST consequences for the short pulse switching behavior.

AB - We report on spin valve devices that incorporate both an out-of-plane polarizer (OPP) to quickly excite spin torque (ST) switching and an in-plane polarizer/analyzer (IPP). For pulses <200 ps, we observe reliable precessional switching due largely to ST from the OPP. Compared to a conventional spin valve, for a given current amplitude from ∼2 to 3 times the zero-thermal-fluctuation critical current (Ic0), the addition of the OPP can decrease the pulse width necessary for switching by a factor of 10 or more. The effect of the IPP also has beneficial ST consequences for the short pulse switching behavior.

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