Measuring the atomic spin-flip scattering rate by x-ray emission spectroscopy
- While extensive work has been dedicated to the measurement of the demagnetization time following an ultra-short laser pulse, experimental studies of its underlying microscopic mechanisms are still scarce. In transition metal ferromagnets, one of the main mechanism is the spin-flip of conduction electrons driven by electron-phonon scattering. Here, we present an original experimental method to monitor the electron-phonon mediated spin-flip scattering rate in nickel through the stringent atomic symmetry selection rules of x-ray emission spectroscopy. Increasing the phonon population leads to a waning of the 3d -> 2p(3/2) decay peak intensity, which reflects an increase of the angular momentum transfer scattering rate attributed to spin-flip. We find a spin relaxation time scale in the order of 50 fs in the 3d-band of nickel at room temperature, while consistantly, no such peak evolution is observed for the diamagnetic counterexample copper, using the same method.
Verfasserangaben: | Régis DeckerORCiD, Artur BornGND, Robby BüchnerORCiDGND, Kari RuotsalainenORCiD, Christian StråhlmanORCiD, Stefan Neppl, Robert HaverkampORCiD, Annette PietzschORCiD, Alexander FöhlischORCiDGND |
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DOI: | https://doi.org/10.1038/s41598-019-45242-8 |
ISSN: | 2045-2322 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/31222052 |
Titel des übergeordneten Werks (Englisch): | Scientific reports |
Verlag: | Nature Publ. Group |
Verlagsort: | London |
Publikationstyp: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Datum der Erstveröffentlichung: | 20.06.2019 |
Erscheinungsjahr: | 2019 |
Datum der Freischaltung: | 21.01.2021 |
Band: | 9 |
Seitenanzahl: | 6 |
Fördernde Institution: | ERC-ADG-2014 Advanced Investigator Grant under the Horizon 2020 EU Framework, Programme for Research and Innovation [669531 EDAX]; Helmholtz Virtual Institute [VI419] |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Peer Review: | Referiert |
Publikationsweg: | Open Access / Gold Open-Access |
DOAJ gelistet | |
Lizenz (Deutsch): | CC-BY - Namensnennung 4.0 International |