Macrospin model to explain the absence of preswitching oscillations in magnetic tunnel junctions: Fieldlike spin-transfer torque

Author(s)

Samir Garzon, University of South Carolina - Columbia
Yaroslaw Bazaliy, University of South Carolina - Columbia
Richard A. Webb, University of South Carolina - ColumbiaFollow
Mark Covington
Shehzaad Kaka
Thomas M. Crawford, University of South Carolina - Columbia

Document Type

Article

Abstract

We show that the absence of preswitching oscillations (“incubation delay”) in magnetic tunnel junctions can be explained within the macrospin model by a sizable fieldlike 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 fieldlike torque.

Publication Info

Published in Physical Review B, Volume 79, Issue 10, 2009, pages 100402-1-100402-4.

Garzon, S., Bazaliy, Y., Webb, R.A., Covington, M., Kaka, S., and Crawford, T.M. (2009). Macrospin model to explain the absence of preswitching oscillations in magnetic tunnel junctions: Fieldlike spin-transfer torque. Physical Review B, 79(10), 100402-1 - 100402-4. doi: 10.1103/PhysRevB.79.100402

© 2009 The American Physical Society.

Rights

Garzon, S., Bazaliy, Y., Webb, R.A., Covington, M., Kaka, S., and Crawford, T.M. (2009). Macrospin model to explain the absence of preswitching oscillations in magnetic tunnel junctions: Fieldlike spin-transfer torque. Physical Review B, 79(10), 100402-1 - 100402-4. doi: 10.1103/PhysRevB.79.100402

© 2009 The American Physical Society.