TITLE

Universality of thermally assisted magnetic domain-wall motion under spin torque

AUTHOR(S)
Tatara, Gen; Vernier, Nicolas; Ferré, Jacques
PUB. DATE
June 2005
SOURCE
Applied Physics Letters;6/20/2005, Vol. 86 Issue 25, p252509
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Thermally assisted motion of magnetic domain wall under spin torque is studied theoretically. It is shown that the wall velocity v depends exponentially on the spin current, Is, below the threshold value, in the same way as in a thermally activated motion driven by a force. A significant property of the spin torque driven case at low temperature is that the linear term in spin current is universal, i.e., In v∼πh/2e(Is/kBT). This behavior, which is independent of pinning and material constants, could be used to confirm experimentally the spin torque as the driving mechanism.
ACCESSION #
17636561

 

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