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

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

2010-10-24

arxiv.org/abs/1010.4954v1

Appl. Phys. Lett. 98, 083110 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4pages, 2 figures

Scientific paper

10.1063/1.3556270

The miniaturisation 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 current 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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