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Distinct Ultrafast Electronic and Magnetic Response in M-edge Magnetic Circular Dichroism
- Source :
- Phys. Rev. B 102, 100405 (2020)
- Publication Year :
- 2020
-
Abstract
- Experimental investigations of ultrafast magnetization dynamics increasingly employ resonant magnetic spectroscopy in the ultraviolet spectral range. Besides allowing to disentangle the element-specific transient response of functional magnetic systems, these techniques also promise to access attosecond to few-femtosecond dynamics of spin excitations. Here, we report on a systematic study of transient magnetic circular dichroism (MCD) on the transition metals Fe, Co and Ni as well as on a FeNi and GdFe alloy and reveal a delayed onset between the electronic and magnetic response. Supported by \textit{ab-initio} calculations, we attribute our observation to a transient energy shift of the absorption and MCD spectra at the corresponding elemental resonances due to non-equilibrium changes of electron occupations.<br />Comment: 8 figures
- Subjects :
- Physics - Optics
Condensed Matter - Mesoscale and Nanoscale Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 102, 100405 (2020)
- Publication Type :
- Report
- Accession number :
- edsarx.2005.02872
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.102.100405