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

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

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


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 languageEnglish
Article number083110
JournalApplied Physics Letters
Issue number8
Publication statusPublished - 2011 Feb 21


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