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Media type:
E-Article
Title:
Pump–probe x-ray microscopy of photo-induced magnetization dynamics at MHz repetition rates
Contributor:
Gerlinger, Kathinka;
Pfau, Bastian;
Hennecke, Martin;
Kern, Lisa-Marie;
Will, Ingo;
Noll, Tino;
Weigand, Markus;
Gräfe, Joachim;
Träger, Nick;
Schneider, Michael;
Günther, Christian M.;
Engel, Dieter;
Schütz, Gisela;
Eisebitt, Stefan
Published:
AIP Publishing, 2023
Published in:
Structural Dynamics, 10 (2023) 2
Language:
English
DOI:
10.1063/4.0000167
ISSN:
2329-7778
Origination:
Footnote:
Description:
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.