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
- 이억재; V. S. Pribiag; P. M. Braganca; P. G. Gowtham; D. C. Ralph; R. A. Buhrman
- spin torque switching; ultrafast magnetization switching; precessional switching
- Issue Date
- Applied physics letters
- VOL 95, NO 1, 012506
- 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 similar to 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. (C) 2009 American Institute of Physics
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