Fast deterministic switching in orthogonal spin torque devices via the control of the relative spin polarizations
Abstract
We model 100 ps pulse switching dynamics of orthogonal spin transfer (OST) devices that employ an out-of-plane polarizer and an in-plane polarizer. Simulation results indicate that increasing the spin polarization ratio, C P = PIPP/POPP, results in deterministic switching of the free layer without over-rotation (360° rotation). By using spin torque asymmetry to realize an enhanced effective PIPP, we experimentally demonstrate this behavior in OST devices in parallel to anti-parallel switching. Modeling predicts that decreasing the effective demagnetization field can substantially reduce the minimum CP required to attain deterministic switching, while retaining low critical switching current, Ip ∼ 500 μA. © 2013 AIP Publishing LLC.
Date Published
Journal
AIP Publishing
Volume
103
Issue
25
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84891418093&doi=10.1063%2f1.4851855&partnerID=40&md5=d9337f78cc317c51ed097020e682b184
DOI
10.1063/1.4851855
Research Area
Group (Lab)
Funding Source
ECS-0335765
DMR-1120296