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

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...

Full description

Saved in:
Bibliographic Details
Published in:Structural dynamics (Melville, N.Y.) N.Y.), 2023-03, Vol.10 (2), p.024301-024301
Main Authors: 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
Format: Article
Language:English
Subjects:
Aperture
Excitation
Experiments
Heat sinks
Infrared lasers
Lasers
Magnetization
Microscopes
Microscopy
Phase transitions
Radiation
Repetition
Spatial resolution
Thin films
X ray microscopy
X-rays
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2329-7778
2329-7778
DOI:10.1063/4.0000167