1. Pump–probe x-ray microscopy of photo-induced magnetization dynamics at MHz repetition rates.
- Author
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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, and Eisebitt, Stefan
- Subjects
MAGNETIZATION ,LASER pumping ,INFRARED lasers ,X-ray spectroscopy ,DEMAGNETIZATION ,SPATIAL resolution ,X-ray microscopy - Abstract
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. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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