dc.contributor.author
Liu, Bo
dc.contributor.author
Xiao, Huijuan
dc.contributor.author
Weinelt, Martin
dc.date.accessioned
2023-08-08T11:40:30Z
dc.date.available
2023-08-08T11:40:30Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/40355
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-40076
dc.description.abstract
Laser-induced spin transport is a key ingredient in ultrafast spin dynamics. However, it remains debated to what extent ultrafast magnetization dynamics generates spin currents and vice versa. We use time- and spin-resolved photoemission spectroscopy to study an antiferromagnetically coupled Gd/Fe bilayer, a prototype system for all-optical switching. Spin transport leads to an ultrafast drop of the spin polarization at the Gd surface, demonstrating angular-momentum transfer over several nanometers. Thereby, Fe acts as spin filter, absorbing spin majority but reflecting spin minority electrons. Spin transport from Gd to Fe was corroborated by an ultrafast increase of the Fe spin polarization in a reversed Fe/Gd bilayer. In contrast, for a pure Gd film, spin transport into the tungsten substrate can be neglected, as spin polarization stays constant. Our results suggest that ultrafast spin transport drives the magnetization dynamics in Gd/Fe and reveal microscopic insights into ultrafast spin dynamics.
en
dc.format.extent
11 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by-nc/4.0/
dc.subject
spin transport
en
dc.subject
ultrafast magnetization dynamics
en
dc.subject
Gd/Fe bilayer
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
dc.title
Microscopic insights to spin transport–driven ultrafast magnetization dynamics in a Gd/Fe bilayer
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
eade0286
dcterms.bibliographicCitation.doi
10.1126/sciadv.ade0286
dcterms.bibliographicCitation.journaltitle
Science Advances
dcterms.bibliographicCitation.number
20
dcterms.bibliographicCitation.volume
9
dcterms.bibliographicCitation.url
https://doi.org/10.1126/sciadv.ade0286
refubium.affiliation
Physik
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2375-2548
refubium.resourceType.provider
WoS-Alert