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

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

2009-06-15

arxiv.org/abs/0906.2585v1

Physics

Condensed Matter

Other Condensed Matter

14 pages, 2 figures

Scientific paper

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 in the short pulse regime the addition of the OPP can decrease the pulse width necessary for switching by a factor of 10 or more. The influence of the IPP is most obvious at longer, smaller pulses, but also has beneficial ST consequences for short pulse switching.

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