Journal
PHYSICAL REVIEW LETTERS
Volume 123, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.123.057203
Keywords
-
Categories
Funding
- Office of Naval Research [N00014-15-1-2449]
- NSF MRSEC program through the Cornell Center for Materials Research [DMR-1719875]
- NSF [ECCS-1542081]
Ask authors/readers for more resources
The effective spin-mixing conductance (G(eff)(up down arrow)) of a heavy-metal-ferromagnet (HM-FM) interface characterizes the efficiency of the interfacial spin transport. Accurately determining G(eff)(up down arrow) is critical to the quantitative understanding of measurements of direct and inverse spin Hall effects. G(eff)(up down arrow) is typically ascertained from the inverse dependence of magnetic damping on the FM thickness under the assumption that spin pumping is the dominant mechanism affecting this dependence. We report that this assumption fails badly in many in-plane magnetized prototypical HM-FM systems in the nanometer-scale thickness regime. Instead, the majority of the damping is from two-magnon scattering at the FM interface, while spin-memory-loss scattering at the interface can also be significant. If these two effects are neglected, the results will be an unphysical giant apparent G(eff)(up down arrow) and hence considerable underestimation of both the spin Hall ratio and the spin Hall conductivity in inverse or direct spin Hall experiments.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available