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Femtosecond X-ray magnetic circular dichroism absorption spectroscopy at an X-ray free electron laser
- Source :
- Review of Scientific Instruments, 87(3):033110. American Institute of Physics, Review of Scientific Instruments, Review of Scientific Instruments, American Institute of Physics, 2016, 87 (3), pp.033110. ⟨10.1063/1.4944410⟩, Review of scientific instruments 87(3), 033110 (2016). doi:10.1063/1.4944410
- Publication Year :
- 2016
- Publisher :
- AIP Publishing, 2016.
-
Abstract
- X-ray magnetic circular dichroism spectroscopy using an X-ray free electron laser is demonstrated with spectra over the Fe L$_{3,2}$-edges. This new ultrafast time-resolved capability is then applied to a fluence-dependent study of all-optical magnetic switching dynamics of Fe and Gd magnetic sublattices in a GdFeCo thin film above its magnetization compensation temperature. At the magnetic switching fuence, we corroborate the existence of a transient ferromagnetic-like state. The timescales of the dynamics, however, are longer than previously observed below the magnetization compensation temperature. Above and below the switching fluence range, we observe secondary demagnetization with about 5 ps timescales. This indicates that the spin thermalization takes longer than 5 ps.<br />5 pages, 4 figures
- Subjects :
- Materials science
Absorption spectroscopy
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences
Physics::Optics
02 engineering and technology
01 natural sciences
Molecular physics
Magnetization
0103 physical sciences
ddc:530
[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]
010306 general physics
Spectroscopy
Instrumentation
ComputingMilieux_MISCELLANEOUS
[PHYS]Physics [physics]
Condensed Matter - Materials Science
Magnetic circular dichroism
Demagnetizing field
Free-electron laser
Materials Science (cond-mat.mtrl-sci)
021001 nanoscience & nanotechnology
3. Good health
X-ray magnetic circular dichroism
Femtosecond
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
0210 nano-technology
Subjects
Details
- ISSN :
- 10897623 and 00346748
- Volume :
- 87
- Database :
- OpenAIRE
- Journal :
- Review of Scientific Instruments
- Accession number :
- edsair.doi.dedup.....e2839f152b3c697523b0fe6cae1f9c64