Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Spin transfer switching of spin valve nanopillars using nanosecond pulsed currents



Shehzaad F. Kaka, Matthew Pufall, William Rippard, Thomas J. Silva, Stephen E. Russek, Jordan A. Katine, Matt Carey


Spin valve nanopillars are reversed via the mechanism of spin momentum transfer using current pulses applied perpendicular to the film plane of the device. The applied pulses were varied in amplitude from 1.8 to 7.8 mA, and varied in duration within the range of 100 ps-200 ns. The probability of device reversal is measured as a function of the pulse duration for each pulse amplitude. The reciprocal pulse duration required for 95% reversal probability is linearly related to the pulse current amplitude for currents exceeding 1.9 mA. For this device, 1.9 mA marks the crossover between dynamic reversal at larger currents and reversal by thermal activation for smaller currents.
Journal of Magnetism and Magnetic Materials


Current-induced magnetization reversal, Magnetic devices, Magnetization reversal, MRAM, Nanopillars, Spin momentum transfer, spin torque, Spin valves


Kaka, S. , Pufall, M. , Rippard, W. , Silva, T. , Russek, S. , Katine, J. and Carey, M. (2004), Spin transfer switching of spin valve nanopillars using nanosecond pulsed currents, Journal of Magnetism and Magnetic Materials, [online], (Accessed June 16, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created October 28, 2004, Updated October 12, 2021