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arXiv · 1907.00601

Electrically driven spin torque and dynamical Dzyaloshinskii-Moriya interaction in magnetic bilayer systems

Akihito Takeuchi·Shigeyasu Mizushima·Masahito Mochizuki
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Abstract

Efficient control of magnetism with electric means is a central issue of current spintronics research, which opens an opportunity to design integrated spintronic devices. However, recent well-studied methods are mostly based on electric-current injection, and they are inevitably accompanied by considerable energy losses through Joule heating. Here we theoretically propose a way to exert spin torques into magnetic bilayer systems by application of electric voltages through taking advantage of the Rashba spin-orbit interaction. The torques resemble the well-known electric-current-induced torques, providing similar controllability of magnetism but without Joule-heating energy losses. The torques also turn out to work as an interfacial Dzyaloshinskii-Moriya interaction which enables us to activate and create noncollinear magnetism like skyrmions by electric-voltage application. Our proposal offers an efficient technique to manipulate magnetizations in spintronics devices without Joule-heating energy losses.

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Akihito Takeuchi, Shigeyasu Mizushima, Masahito Mochizuki. 2019-07-01. Electrically driven spin torque and dynamical Dzyaloshinskii-Moriya interaction in magnetic bilayer systems. https://doi.org/10.1038/s41598-019-46009-x

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