Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 46: Poster II
MA 46.58: Poster
Donnerstag, 21. März 2024, 15:00–18:00, Poster C
Differentiating mechanisms that drive ultrafast magnetization precession — •Fried-Conrad Weber1, Jasmin Jarecki2, Max Mattern1, Alexander von Reppert1, and Matias Bargheer1,3 — 1Institute of Physics and Astronomy, University of Potsdam — 2Max-Born-Institute, Berlin — 3Helmholtz-Zentrum, Berlin
We study the influence of strain and heat on the ultrafast magnetization precession in Cobalt and Nickel. To achieve this, we combine trMOKE measurement of various samples under different initial conditions, with numerical simulations. We model the ultrafast dynamics of heat and strain in laser-excited thin films and the magnetization precession that is triggered by the concomitant time-dependent effective fields. In this way, we aim at understanding and controlling the complex interplay of heat, strain and magnetization dynamics.
Keywords: Precession; Nickel; Cobalt; Ferromagnetism