dc.contributor.author
Lee, Sang-Eun
dc.contributor.author
Windsor, Yoav William
dc.contributor.author
Fedorov, Alexander
dc.contributor.author
Kliemt, Kristin
dc.contributor.author
Krellner, Cornelius
dc.contributor.author
Schüssler-Langeheine, Christian
dc.contributor.author
Pontius, Niko
dc.contributor.author
Wolf, Martin
dc.contributor.author
Atxitia, Unai
dc.contributor.author
Vyalikh, Denis V.
dc.date.accessioned
2023-01-19T08:25:30Z
dc.date.available
2023-01-19T08:25:30Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/37700
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-37415
dc.description.abstract
The ultrafast manipulation of magnetic order due to optical excitation is governed by the intricate flow of energy and momentum between the electron, lattice, and spin subsystems. While various models are commonly employed to describe these dynamics, a prominent example being the microscopic three temperature model (M3TM), systematic, quantitative comparisons to both the dynamics of energy flow and magnetic order are scarce. Here, an M3TM was applied to the ultrafast magnetic order dynamics of the layered antiferromagnet GdRh2Si2. The femtosecond dynamics of electronic temperature, surface ferromagnetic order, and bulk antiferromagnetic order were explored at various pump fluences employing time- and angle-resolved photoemission spectroscopy and time-resolved resonant magnetic soft X-ray diffraction, respectively. After optical excitation, both the surface ferromagnetic order and the bulk antiferromagnetic order dynamics exhibit two-step demagnetization behaviors with two similar timescales (<1 ps, ∼10 ps), indicating a strong exchange coupling between localized 4f and itinerant conduction electrons. Despite a good qualitative agreement, the M3TM predicts larger demagnetization than the experimental observation, which can be phenomenologically described by a transient, fluence-dependent increased Néel temperature. The results indicate that effects beyond a mean-field description have to be considered for a quantitative description of ultrafast magnetic order dynamics.
en
dc.format.extent
10 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
antiferromagnet
en
dc.subject
microscopic three-temperature model
en
dc.subject
surface and bulk magnetism
en
dc.subject
ultrafast spin dynamics
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
dc.title
Robust Magnetic Order Upon Ultrafast Excitation of an Antiferromagnet
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
2201340
dcterms.bibliographicCitation.doi
10.1002/admi.202201340
dcterms.bibliographicCitation.journaltitle
Advanced Materials Interfaces
dcterms.bibliographicCitation.number
36
dcterms.bibliographicCitation.volume
9
dcterms.bibliographicCitation.url
https://doi.org/10.1002/admi.202201340
refubium.affiliation
Physik
refubium.affiliation.other
Dahlem Center für komplexe Quantensysteme
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2196-7350
refubium.resourceType.provider
WoS-Alert