Cargando…

Using the photoinduced L(3) resonance shift in Fe and Ni as time reference for ultrafast experiments at low flux soft x-ray sources

We study the optical-pump induced ultrafast transient change of x-ray absorption at L(3) absorption resonances of the transition metals Ni and Fe in the Fe(0.5)Ni(0.5) alloy. We find the effect for both elements to occur simultaneously on a femtosecond timescale. This effect may hence be used as a h...

Descripción completa

Detalles Bibliográficos
Autores principales: Jana, Somnath, Muralidhar, Shreyas, Åkerman, Johan, Schüßler-Langeheine, Christian, Pontius, Niko
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Crystallographic Association 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8357444/
https://www.ncbi.nlm.nih.gov/pubmed/34395721
http://dx.doi.org/10.1063/4.0000108
Descripción
Sumario:We study the optical-pump induced ultrafast transient change of x-ray absorption at L(3) absorption resonances of the transition metals Ni and Fe in the Fe(0.5)Ni(0.5) alloy. We find the effect for both elements to occur simultaneously on a femtosecond timescale. This effect may hence be used as a handy cross correlation scheme, providing a time-zero reference for ultrafast optical-pump soft x-ray-probe measurement. The method benefits from a relatively simple experimental setup as the sample itself acts as time-reference tool. In particular, this technique works with low flux ultrafast soft x-ray sources. The measurements are compared to the cross correlation method introduced in an earlier publication.