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

Swarnali Bandopadhyay; Arne Brataas; Gerrit E.W. Bauer

doi:10.1063/1.3556270

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

Swarnali Bandopadhyay, Arne Brataas, Gerrit E.W. Bauer

Advanced Institute for Materials Research (AIMR)

Norwegian University of Science and Technology

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

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.

Original language	English
Article number	083110
Journal	Applied Physics Letters
Volume	98
Issue number	8
DOIs	https://doi.org/10.1063/1.3556270
Publication status	Published - 2011 Feb 21

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abstract = "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.",

author = "Swarnali Bandopadhyay and Arne Brataas and Bauer, {Gerrit E.W.}",

note = "Funding Information: This work was supported by EC Contract No. IST-033749 DynaMax and by EU FP7 ICT Grant No. 251759 MACALO. S.B. acknowledges hospitality of TU Delft.",

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N2 - 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.

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

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