Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 8: Ultrafast Magnetization Effects 1
MA 8.1: Vortrag
Montag, 5. September 2022, 15:00–15:15, H37
Spectrally resolved spin dynamics of 3d transition metals in EUV T-MOKE — •Henrike Probst1, Christina Möller1, Mariana Brede1, Maren Schumacher1, Karen Stroh1, Marcel Reutzel1, G. S. Matthijs Jansen1, Sangeeta Sharma2, Daniel Steil1, and Stefan Mathias1 — 1I. Physikalisches Institut, University of Göttingen — 2Max-Born-Institute for Non-linear Optics and Short Pulse Spectroscopy, Berlin
Light in the extreme ultraviolet (EUV) range has found increasing application in the field of magneto-optical spectroscopy. It allows to get new insights in light-matter interaction processes, as EUV spectroscopy provides the potential to investigate energy- and element-resolved spin dynamics [1-2].
Here, we carry out a comprehensive study of spectrally resolved spin dynamics of the 3d transition metals Co, Fe and Ni using EUV transverse magneto-optical Kerr spectroscopy (T-MOKE) [3]. Covering the M-edges in the 30-72 eV energy window, this allows to resolve spin dynamics at specific energies around the Fermi-level. We discuss different processes leading to energy dependent changes in the magnetic asymmetry at early times after the optical excitation, i.e. charge excitation and band renormalization.
[1] Hofherr et al., Sci. Adv. 6.3 (2020): eaay8717.
[2] Tengdin et al., Sci. Adv. 6.3 (2020): eaaz1100.
[3] Möller et al., Rev. Sci. Instrum., 92(6) (2021): 065107.