We present a novel setup to measure the transverse magneto-optical Kerr effect in the extreme ultraviolet spectral range at exceptionally high repetition rates based on a fiber laser amplifier system. This affords a very high and stable flux of extreme ultraviolet light, which we use to measure element-resolved demagnetization dynamics with unprecedented depth of information. Furthermore, the setup is equipped with a strong electromagnet and a cryostat, allowing measurements between 10 and 420 K using magnetic fields up to 0.86 T. The performance of our setup is demonstrated by a set of temperature- and time-dependent magnetization measurements showing distinct element-dependent behavior.
@article{arxiv.2103.12367,
title = {Ultrafast element-resolved magneto-optics using a fiber-laser-driven extreme ultraviolet light source},
author = {Christina Möller and Henrike Probst and Johannes Otto and Karen Stroh and Carsten Mahn and Sabine Steil and Vasily Moshnyaga and G. S. Matthijs Jansen and Daniel Steil and Stefan Mathias},
journal= {arXiv preprint arXiv:2103.12367},
year = {2023}
}