Electrically driven spin torque and dynamical Dzyaloshinskii-Moriya interaction in magnetic bilayer systems
arXiv:1907.00601 · doi:10.1038/s41598-019-46009-x
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.
22 pages, 3 figures
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Cited by in corpus (7)
- Dynamic Excitations of Chiral Magnetic Textures
- Dynamical Switching of Magnetic Topology in Microwave-Driven Itinerant Magnet
- Fundamental Theory of Current-Induced Motion of Magnetic Skyrmions
- Creation of nanometric magnetic skyrmions by global application of circularly polarized microwave magnetic field
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- Theory of surface-induced multiferroicity in magnetic materials, thin films and multilayers
- Hybrid magnetization dynamics in / heterostructures