Spin-torque-driven ballistic precessional switching with 50 ps impulses

Title
Spin-torque-driven ballistic precessional switching with 50 ps impulses
Authors
이억재DC RalphRA Buhrman
Issue Date
2011-09
Publisher
Applied physics letters
Citation
VOL 99, NO 10, 102507
Abstract
We demonstrate reliable spin-torque-driven ballistic precessional switching using 50 ps current impulses in a spin-valve device that includes both in-plane and out-of-plane spin polarizers. Different threshold currents as the function of switching direction and current polarity enable the final orientation of the magnetic free layer to be steered, in accord with a macrospin analysis, by the sign of the pulse, eliminating the need for read-before-write toggle operation. The pulse amplitude windows for this deterministic operation are wider and more symmetric as a function of current polarity for shorter impulses, while inhomogeneous fringe fields from the polarizers lead to asymmetries as a function of current direction. (C) 2011 American Institute of Physics
URI
http://pubs.kist.re.kr/handle/201004/65307
ISSN
0003-6951
Appears in Collections:
KIST Publication > Article
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