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2017•Physical Review AppliedRequires access

Spintronic Oscillator Based on Spin-Current Feedback Using the Spin Hall Effect

Swapnil Bhuktare, Hanuman Singh, Arnab Bose, Ashwin A. Tulapurkar

Open publisher page 22 citations

Abstract

As spintronics continues to replace conventional electronics, devices that produce oscillatory signals are needed in particular. They are usually based on spin-transfer torque, but this study offers an alternative, based on feedback of spin current into a magnetic tunnel junction (MTJ). A combination of thermal fluctuations, magnetoresistance, and the spin Hall effect can induce periodic precessional states in the MTJ's free layer, significantly reducing the critical current for oscillations and improving their quality factor.

About this research paper

What this paper is about

As spintronics continues to replace conventional electronics, devices that produce oscillatory signals are needed in particular. They are usually based on spin-transfer torque, but this study offers an alternative, based on feedback of spin current into a magnetic tunnel junction (MTJ). A combination of thermal fluctuations, magnetoresistance, and the spin Hall effect can induce periodic precessional states in the MTJ's free layer, significantly reducing the critical current for oscillations and improving their quality factor.

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OpenAlex reports 22 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

As spintronics continues to replace conventional electronics, devices that produce oscillatory signals are needed in particular. They are usually based on spin-transfer torque, but this study offers an alternative, based on feedback of spin current into a magnetic tunnel junction (MTJ). A combination of thermal fluctuations, magnetoresistance, and the spin Hall effect can induce periodic precessional states in the MTJ's free layer, significantly reducing the critical current for oscillations and improving their quality factor.

Key concepts: Spintronics, Spin-transfer torque, Tunnel magnetoresistance, Spin current, Condensed matter physics, Magnetoresistance, Spin (aerodynamics), Spin Hall effect

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