Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).
NIST Authors in Bold
|Author(s):||Matthew R. Pufall; William H. Rippard; Shehzaad F. Kaka; Stephen E. Russek; Thomas J. Silva; Jordan A. Katine; Matt Carey;|
|Title:||Large-angle, gigahertz-rate random telegraph switching induced by spin-momentum transfer|
|Published:||July 27, 2004|
|Abstract:||We show that a spin-polarized dc current passing through a small magnetic element induces two-state, random telegraph switching of the magnetization via the spin-momentum transfer effect. The resistances of the states differ by up to 50% of the change due to complete magnetization reversal. Fluctuations are seen for a wide range of currents and magnetic fields, with rates that can exceed 2 GHz, and involve collective motion of a large volume (10^4^ nm^3^) of spins. Switching rate trends with field and current indicate that increasing temperature alone cannot explain the dynamics. The rates approach a stochastic regime wherein dynamics are governed by both precessional motion and thermal perturbations.|
|Citation:||Physical Review B (Condensed Matter and Materials Physics)|
|Pages:||pp. 214409-1 - 214409-5|
|Keywords:||1/f noise,spin-momentum transfer,spin-valve,telegraph noise|
|PDF version:||Click here to retrieve PDF version of paper (521KB)|