Temperature dependence of spin-transfer-induced switching of nanomagnets.
We measure the temperature, magnetic-field, and current dependence for the switching of nanomagnets by a spin-polarized current. Depending on current bias, switching can occur between either two static magnetic states or a static state and a current-driven precessional mode. In both cases, the switching is thermally activated and governed by the sample temperature, not a higher effective magnetic temperature. The activation barriers for switching between static states depend linearly on current, with a weaker dependence for dynamic to static switching.
Krivorotov
I N
IN
Cornell University, Ithaca, New York 14853, USA.
Emley
N C
NC
Garcia
A G F
AG
Sankey
J C
JC
Kiselev
S I
SI
Ralph
D C
DC
Buhrman
R A
RA