Regensburg 2022 – scientific programme
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MA: Fachverband Magnetismus
MA 25: Ultrafast Magnetization Effects 2
MA 25.8: Talk
Wednesday, September 7, 2022, 16:45–17:00, H43
Ultrafast magnetization dynamics in heterogeneous material compositions — •Sebastian T. Weber1, Christopher Seibel1, Marius Weber1, Martin Stiehl1, Sanjay Ashok1, Simon Häuser1, Martin Aeschlimann1, Hans Christian Schneider1, Benjamin Stadtmüller1,2, and Baerbel Rethfeld1 — 1Department of Physics and Research Center OPTIMAS, TU Kaiserslautern — 2Institute of Physics, Johannes Gutenberg University Mainz
Ultrafast magnetization dynamics plays a key role in the development of spintronic devices. The dynamics are influenced by the composition of material systems as well as the wavelength of the optical excitation. The latter can create spatially inhomogeneous excitation profiles in thick nickel films [1,2] or Ni|Au heterostructures [3].
In this contribution, we compare results of the thermodynamic µT-model with kinetic Boltzmann calculations and MOKE-measurements to investigate
the influence of the wavelength on magnetization dynamics in different compositions.
Our results show that laser and material parameters can enhance or hinder the interplay of relaxation processes, leading to different laser-induced magnetization dynamics.
[1] U. Bierbrauer et al., JOP: Cond. Mat. 29, 244002 (2017)
[2] S. Ashok et al., Appl. Phys. Lett. 120, 142402 (2022)
[3] C. Seibel et al., arXiv:2112.04780 (2021)