The domain wall spin torque-meter

Details The domain wall spin torque-meter The domain wall spin torque-meter

2008-10-25

arxiv.org/abs/0810.4633v1

Physics

Condensed Matter

Other Condensed Matter

12 pages plus supplementary notes

Scientific paper

10.1103/PhysRevLett.102.137202

We report the direct measurement of the non-adiabatic component of the spin-torque in domain walls. Our method is independent of both the pinning of the domain wall in the wire as well as of the Gilbert damping parameter. We demonstrate that the ratio between the non-adiabatic and the adiabatic components can be as high as 1, and explain this high value by the importance of the spin-flip rate to the non-adiabatic torque. Besides their fundamental significance these results open the way for applications by demonstrating a significant increase of the spin torque efficiency.

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