6533b85cfe1ef96bd12bc06a
RESEARCH PRODUCT
Interface enhancement of Gilbert damping from first-principles
R. J. H. WesselinkPaul J. KellyA.a. StarikovZhe YuanZhe YuanYi Liusubject
Condensed Matter - Materials ScienceMaterials scienceCondensed matter physicsScatteringInterface (Java)General Physics and AstronomyMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesCondensed Matter::Strongly Correlated ElectronsMETIS-306267Diffusion (business)IR-94946Spin-½description
The enhancement of Gilbert damping observed for Ni_{80}Fe_{20} (Py) films in contact with the nonmagnetic metals Cu, Pd, Ta, and Pt is quantitatively reproduced using first-principles scattering calculations. The "spin-pumping" theory that qualitatively explains its dependence on the Py thickness is generalized to include a number of extra factors known to be important for spin transport through interfaces. Determining the parameters in this theory from first principles shows that interface spin flipping makes an essential contribution to the damping enhancement. Without it, a much shorter spin-flip diffusion length for Pt would be needed than the value we calculate independently.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-06-24 |