Pump-probe x-ray microscopy of photo-induced magnetization dynamics at MHz repetition rates.

Autor:	Gerlinger K; Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany., Pfau B; Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany., Hennecke M; Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany., Kern LM; Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany., Will I; Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany., Noll T; Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany., Weigand M; Helmholtz-Zentrum Berlin für Materialien und Energie, 12489 Berlin, Germany., Gräfe J; Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany., Träger N; Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany., Schneider M; Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany., Günther CM; Technische Universität Berlin, Zentraleinrichtung Elektronenmikroskopie (ZELMI), 10623 Berlin, Germany., Engel D; Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany., Schütz G; Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany., Eisebitt S
Jazyk:	angličtina
Zdroj:	Structural dynamics (Melville, N.Y.) [Struct Dyn] 2023 Mar 21; Vol. 10 (2), pp. 024301. Date of Electronic Publication: 2023 Mar 21 (Print Publication: 2023).
DOI:	10.1063/4.0000167
Abstrakt:	We present time-resolved scanning x-ray microscopy measurements with picosecond photo-excitation via a tailored infrared pump laser at a scanning transmission x-ray microscope. Specifically, we image the laser-induced demagnetization and remagnetization of thin ferrimagnetic GdFe films proceeding on a few nanoseconds timescale. Controlling the heat load on the sample via additional reflector and heatsink layers allows us to conduct destruction-free measurements at a repetition rate of 50 MHz. Near-field enhancement of the photo-excitation and controlled annealing effects lead to laterally heterogeneous magnetization dynamics which we trace with 30 nm spatial resolution. Our work opens new opportunities to study photo-induced dynamics on the nanometer scale, with access to picosecond to nanosecond time scales, which is of technological relevance, especially in the field of magnetism. Competing Interests: The authors have no conflicts to disclose. (© 2023 Author(s).)
Databáze:	MEDLINE
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