Current dependence of spin torque switching rate based on Fokker-Planck   approach
  The spin torque switching rate of an in-plane magnetized system in the presence of an applied field is derived by solving the Fokker-Planck equation. It is found that three scaling currents are necessary to describe the current dependence of the switching rate in the low-current limit. The dependences of these scaling currents on the applied field strength are also studied. 
Tomohiro Taniguchi and Hiroshi Imamura
cond-mat.mes-hall