
Open access
Date
2014-04Type
- Journal Article
Citations
Cited null times in
Web of Science
Cited 8 times in
Scopus
ETH Bibliography
yes
Altmetrics
Abstract
Spin-resolved photoemission is one of the most direct ways of measuring the magnetization of a ferromagnet. If all valence band electrons contribute, the measured average spin polarization is proportional to the magnetization. This is even the case if electronic excitations are present, and thus is of particular interest for studying the response of the magnetization to a pump laser pulse. Here, we demonstrate the feasibility of ultrafast spin-resolved photoemission using free electron laser (FEL) radiation and investigate the effect of space charge on the detected spin polarization. The sample is exposed to the radiation of the FEL FLASH in Hamburg. Surprisingly, the measured spin polarization depends on the fluence of the FEL radiation: a higher FEL fluence reduces the measured spin polarization. Space-charge simulations can explain this effect. These findings have consequences for future spin-polarized photoemission experiments using pulsed photon sources. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000083858Publication status
publishedExternal links
Journal / series
New Journal of PhysicsVolume
Pages / Article No.
Publisher
Institute of PhysicsSubject
Spin-polarized photoemission; Free electron laser radiation; Space chargeOrganisational unit
03986 - Gambardella, Pietro / Gambardella, Pietro
03815 - Vaterlaus, Andreas / Vaterlaus, Andreas
More
Show all metadata
Citations
Cited null times in
Web of Science
Cited 8 times in
Scopus
ETH Bibliography
yes
Altmetrics