English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Substrate-controlled ultrafast spin injection and demagnetization

MPS-Authors
/persons/resource/persons21462

Dewhurst,  J. K.       
Max Planck Institute of Microstructure Physics, Max Planck Society;

/persons/resource/persons261325

Gross,  E. K. U.
Max Planck Institute of Microstructure Physics, Max Planck Society;

Sharma,  S.
Max Planck Institute of Microstructure Physics, Max Planck Society;

External Resource
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Dewhurst, J. K., Shallcross, S., Gross, E. K. U., & Sharma, S. (2018). Substrate-controlled ultrafast spin injection and demagnetization. Physical Review Applied, 10(4): 044065. doi:10.1103/PhysRevApplied.10.044065.


Cite as: https://hdl.handle.net/21.11116/0000-0009-2E6F-9
Abstract
We investigate the laser-induced ultrafast injection of spin from a ferromagnetic (FM) material into a nonmagnetic (NM) one, for a diverse set of FM-NM interfaces. For all systems, we find the early time (t<20 fs) spin dynamics to be driven by spin currents, with majority spin transferred to the NM and minority spin to the FM. At later times, spin-orbit-induced spin flips further demagnetize the FM, but also deplete the NM of the substantial spin moment injected during the sub-20-fs spin dynamics. We identify the density of unoccupied states in the NM material to be the key physical property that underpins the physics of ultrafast demagnetization of FM layers and a complex interplay of this density of states with the spin-orbit (SO) coupling strength of the NM substrate to be responsible for spin-injection efficiency.