Enhanced spin Hall torque efficiency in Pt100−xAlx and Pt100−xHfx alloys arising from the intrinsic spin Hall effect
Abstract
We report that the spin Hall torque generated by Pt can be enhanced substantially by alloying with Al or Hf. We observe damping-like spin torque efficiency per unit applied current density as high as ξDLj=0.23±0.02, nearly twice the maximum value reported for pure Pt. To achieve this maximum efficiency, a very thin (0.5 nm) Pt spacer layer is inserted between the alloy and the ferromagnet being manipulated, to avoid a degraded spin transparency at the alloy/ferromagnet interface.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 13, 2016
- Source ID
- 10.1063/1.4953768
Entities
People
- D. C. Ralph
- Mengnan Zhao
- Minh-Hai Nguyen
- R. A. Buhrman
Organizations
- Cornell University
- National Science Foundation
- Office of Naval Research
- Samsung Group