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Feedback control of noise in spin valves by the spin-transfer torque

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3 Author(s)
Bandopadhyay, Swarnali ; Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway ; Brataas, Arne ; Bauer, Gerrit E. W.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.3556270 

The miniaturization of magnetic read heads and random access memory elements makes them vulnerable to thermal fluctuations. We demonstrate how current-induced spin-transfer torques can be used to suppress the effects of thermal fluctuations. This enhances the fidelity of perpendicular magnetic spin valves. The simplest realization is a dc to stabilize the free magnetic layers. The power can be significantly reduced without losing fidelity by simple control schemes, in which the stabilizing current-induced spin-transfer torque is controlled by the instantaneous resistance.

Published in:

Applied Physics Letters  (Volume:98 ,  Issue: 8 )

Date of Publication:

Feb 2011

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