Sumwalt,
Friday, Oct. 24, 2008
3:30 PM

Samir Garzon 
"Macrospin model of incubation delay due to the field-like spin transfer torque"

http://arxiv.org/abs/0810.3421 
Authors: Samir Garzon, Yaroslaw Bazaliy, Richard A. Webb, 
Thomas M. Crawford, Mark Covington, Shehzaad Kaka

Abstract: We show that the absence of pre-switching oscillations 
("incubation delay") in magnetic tunnel junctions can be explained 
within the macrospin model by a sizable field-like component of the 
spin-transfer torque. It is further suggested that measurements of 
the voltage dependence of tunnel junction switching time in the 
presence of external easy axis magnetic fields can be used to 
determine the magnitude and voltage dependence of the field-like 
torque.